Female Elk on travertine terraces at Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0537.html Crystal Lake seen from shaft above. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca0477.html Underground pond called Crystal Lake. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca0478.html Stalactites in the Frozen Niagara section. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca0479.html Stalagtites and stalagmites in the Frozen Niagara section. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca5400.html Historic entrance of the cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca5401.html Styx resurgence in winter. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca0481.html Trees in winter with snow and old leaves. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca0502.html May apple Plants with giant leaves on forest floor. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6931.html Blooming Dogwood trees in forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6932.html Houstonia caerulea flowers. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6935.html Flooded trees in Echo River Spring. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6940.html Trees reflected in green water of Echo River Spring. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6943.html Trees and reflections in Echo River Spring. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6944.html Car crossing Green River on ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6938.html Entrance of Frozen Niagara section of the cave in winter. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca0480.html May apple plants with giant leaves on forest floor. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6930.html Blooming Dogwood trees in forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6933.html Flowers and Moss. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6934.html Green River seen from bluff in springtime. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6936.html Crested dwarf irises. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6937.html Flooded trees in Echo River Spring. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6941.html Flooded trees and reflections in Echo River Spring. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6942.html Trees and reflections in green waters of Echo River Spring. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6946.html Reflections in Echo River Spring. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6948.html Forest in fall inside sinkhole. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca5888.html Mammoth Cave church and cemetery. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6947.html Green River ferry crossing. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca6939.html Trail covered with fallen leaves. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39855.html Cascading stream. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39878.html Steps and railing leading down to historical cave entrance. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39885.html Entrance shaft and rain-fed water drip. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39884.html Rain-fed waterfall seen from inside cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39890.html Tourists listening at ranger in large room inside cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39896.html Flowstone, Frozen Niagara. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39903.html Water drips over limestone ledges and Styx. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39867.html Styx stream and forest in fall foliage during rain. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39873.html Forest in autumn color. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39853.html Wooden boardwalk in autumn. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39863.html Ranger pointing to cave entrance to tourists. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39891.html Entrance shaft. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39883.html Steps and handrails leading down to cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39886.html Ephemeral waterfall seen from inside cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39887.html Talk in large room inside cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39893.html Looking up flowstone, Frozen Niagara. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39899.html Stalactites detail, Frozen Niagara. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39910.html Shaft and pool inside cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39892.html Flowstone detail, Frozen Niagara. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39907.html Forest with autumn color seen from inside cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39874.html Limestone slabs and overhangs. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39871.html Stream, boulders, and fallen leaves. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39879.html Stream cascading over limestone rocks. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39880.html Styx river resurgence in autumn. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39868.html Styx underground river resurgence. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39860.html Styx river spring resurgence. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39861.html Limestone ledges, trees, and Styx spring. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39865.html Styx resurgence and limestone ledges. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39866.html Trees with yellow leaves and Styx river during rain. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39870.html Styx spring and forest in autumn foliage during rain. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39872.html Paved trail and forest in fall foliage. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39881.html Trail leading to historic cave entrance in the fall. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39882.html Boardwalk in fall. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39862.html Fallen leaves and boardwalk, ground-level view. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39869.html Drizzle and fall colors. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39854.html Wet boardwalk during rain. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39876.html Trail in autumn forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39858.html Forest in fall color. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39851.html Trees with leaves turned yellow. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39857.html Trail with fallen leaves. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39877.html Forest with fall foliage. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39859.html Deciduous trees with yellow leaves. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39852.html Mammoth Mountain and stream at sunset. Yosemite National Park, California, USA. http://www.terragalleria.com/parks/np-image.yose46957.html Limestone cliffs and karstic depression in autumn. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca20409.html Forest in karstic depression. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca20411.html Trees and limestome cliffs in autumn. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca20412.html Minerva travertine terraces and steam, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21264.html Minerva travertine terraces, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21263.html Limestone cliffs and forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca25560.html Spring forest scene with trees reflected in pond. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca25559.html Flooded trees in Echo River Spring. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca20410.html Forest and stream seen from above. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca25561.html Forest in autumn and cliffs. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca25562.html Main Terrace, Mammoth Hot Springs, morning. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63248.html Travertine terrace detail, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63250.html Dead trees and Main Terrace, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63249.html Pool, travertine terraces, and dead trees, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63247.html Main Terrace, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63246.html Travertine terraces and dead trees, Mammoth Hot Springs, afternoon. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63280.html Main Terrace, afternoon, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63279.html Orange Spring Mound, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63255.html Orange Spring Mound, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63284.html Orange Spring Mound with tree skeleton, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63286.html Detail of travertine terraces, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63251.html Dead tree, Orange Spring Mound, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63285.html Angel Terrace, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63256.html Backlit steam and pool, Main Terrace, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63254.html Living Color interpretive sign, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63277.html Palette Spring, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63276.html Main Terrace, morning, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell63253.html Snags and reflections, Green River. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65490.html Green River at Dennison Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65518.html Wildflowers and sinkhole near Turnhole Bend. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65525.html Dense vegetation in sinkhole near Turnhole Bend. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65526.html Ranger talks to family in cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65498.html Aerial view of Green River curve. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65546.html Visitor looking, Green River. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65489.html Water lillies and frog, Sloans Crossing Pond. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65476.html Couple walking down path in cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65504.html Green River in the morning, Houchin Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65486.html Cave creation Interpretive sign. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65495.html Rotunda Room. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65507.html Historic entrance interpretive sign. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65537.html Aerial view of Green River at sunset. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65551.html Calm waters of Green River, Houchin Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65487.html Aerial view of Green River bend. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65545.html Aerial view of Turnhole Bend of the Green River. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65550.html Ranger with lantern talks to family in cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65496.html Cave passageway near historic entrance. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65493.html Ranger with lantern backlighted in dark cave corridor. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65502.html Limestone ledges with summer wildflowers. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65540.html Visitors walk out of cave via historic entrance. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65508.html Ranger talking to family in cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65499.html Fireflies in forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65531.html Synchronous fireflies in forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65532.html Vistor looking, River Styx resurgence. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65539.html Wet place in a dry land Interpretive sign, Sloans Crossing Pond. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65479.html Sloans Crossing Pond. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65475.html Aquatic plants, Sloans Crossing Pond. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65474.html Close-up of limestone rocks and forest vegetation. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65527.html Path in cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65503.html Vistors in Rotunda Room. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65506.html Visitors walk down path in cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65505.html Green River and reflections at Houchin Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65488.html Green River in the rain at Dennison Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65519.html Close-up of water lillies, Sloans Crossing Pond. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65478.html Aerial view of Green River and forest looking down. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65547.html Limestone ledges and summer blooms. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65541.html Large corridor near historic entrance. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65494.html Passageway and cave ceiling. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65497.html River Styx resurgence in summer. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65538.html Visitors walk down huge corridor in cave. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65500.html Reflections, Sloans Crossing Pond. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65477.html Motion blurred visitors holding lanterns. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65511.html Looking up cave historic entrance. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65512.html Green River, stars and fireflies at night, Houchin Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65484.html Even-bedded limestone of the Mississippian Girkin Formation around sinkhole. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65530.html Sinkhole and fog. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65529.html Fireflies light the night in forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65533.html Fireflies and sinkhole. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65534.html Close-up of moss-covered rocks and undergrowth. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65528.html Many visitors waking into cave through historic entrance. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65510.html Family backlighted in dark cave corridor. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65501.html Cave historic entrance from inside. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65509.html Lights of Synchronous fireflies in forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65552.html Vegetation and Green River. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65521.html Green River and fog, Dennison Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65520.html Rain, Green River. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65517.html Green River at sunset, Houchin Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65482.html Green River at night, Houchin Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65483.html Mammoth Cave Baptist Church and cemetery. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65515.html Looking up tree canopy in summer. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65492.html Summer wildflowers and forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65516.html Doyel Valley in fog. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65524.html Close-up of forest undergrowth. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65542.html Aerial view of Green River and Houchin Ferry looking down. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65548.html Aerial view of Green River and Houchin Ferry. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65549.html Houchin Ferry Road. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65481.html Dennison Ferry Road. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65522.html Unpaved Dennison Ferry Road. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65523.html River Styx Trail in summer. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65543.html Boardwalk, Sloans Crossing Pond. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65480.html Houchin Ferry Campground. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65485.html Visitor Center. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65491.html Window Reflexion Visitor Center. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65536.html Mammoth Cave Hotel. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca65544.html Inside Mammoth Cave Hotel. 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