lavo1501 Bumpass Hell thermal area. Lassen Volcanic National Park, California, USA. http://www.terragalleria.com/parks/np-image.lavo1501.html lavo1502 Sulphur works thermal area. Lassen Volcanic National Park, California, USA. http://www.terragalleria.com/parks/np-image.lavo1502.html lavo1503 Colorful deposits in Bumpass Hell thermal area. Lassen Volcanic National Park, California, USA. http://www.terragalleria.com/parks/np-image.lavo1503.html lavo1505 Colorful deposits in Bumpass Hell thermal area, early summer. Lassen Volcanic National Park, California, USA. http://www.terragalleria.com/parks/np-image.lavo1505.html lavo1507 Colorful deposits and turquoise pool in Bumpass Hell thermal area. Lassen Volcanic National Park, California, USA. http://www.terragalleria.com/parks/np-image.lavo1507.html lavo1508 Mud cauldrons and fumeroles in Bumpass Hell thermal area. Lassen Volcanic National Park, California, USA. http://www.terragalleria.com/parks/np-image.lavo1508.html yell0503 Norris geyser basin at sunrise. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0503.html yell0504 Thermal activity at Norris geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0504.html yell0505 Green and red algaes in Norris geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0505.html yell0506 Trees shadowed in thermal steam, Upper geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0506.html yell0509 Tree skeletons in Black Sand basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0509.html yell0511 Geyser cone in Upper geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0511.html yell0513 Terraces in Great prismatic springs, Midway geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0513.html yell0514 Great prismatic springs, thermal steam, and hill, Midway geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0514.html yell0515 Thermal steam and frosted trees. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0515.html yell0516 Steam and hill, Midway geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0516.html yell0518 Mud cauldron at fountain paint pot. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0518.html yell0520 Minerva travertine terraces at Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0520.html yell1838 Grizzly bear and thermal steam. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell1838.html yell21263 Minerva travertine terraces, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21263.html yell21265 Dead trees and turquoise pond in Norris Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21265.html yell21266 Steam in Norris Geyser Basin at dawn. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21266.html yell21267 Great prismatic springs, Midway geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21267.html yell21268 Great Fountain Geyser with residual steam at sunset. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21268.html yell21270 West Thumb geyser basin and Yellowstone lake. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21270.html yell21274 Thermal pool, upper Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21274.html yell21275 Raibow colored Morning Glory Pool. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21275.html yell21338 Colorful streak and terraces, Great Prismatic Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21338.html yell2243 West Thumb Geyser Basin covered by snow at dusk. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2243.html yell2246 Fumeroles and forest in Upper Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2246.html yell2250 Great Fountain geyser and colorful clouds at sunset. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2250.html yell2251 Trees near Fountain Paint Pot at sunset. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2251.html yell2252 Travertine terraces at Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2252.html yell49243 Thermal pool in winter, West Thumb Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49243.html yell49244 Steam rising from pool in winter, West Thumb. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49244.html yell49245 Thermal pool and dark clouds, winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49245.html yell49246 Snow-covered West Thumb thermal basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49246.html yell49247 Thermal run-off and snowy landscape. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49247.html yell49248 Thermal stream at edge of Yellowstone Lake in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49248.html yell49249 Colorful thermal stream and dark clouds, winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49249.html yell49250 West Thumb Geyser Basin in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49250.html yell49252 Bison and Lion Geyser in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49252.html yell49253 Crested Pool in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49253.html yell49254 Castle geyser cone and steam in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49254.html yell49255 Winter landscape with thermal run-off. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49255.html yell49258 Firehole river and bison in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49258.html yell49259 Upper Geyser Basin in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49259.html yell49260 Photographer standing next to hot springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49260.html yell49261 Hot springs detail. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49261.html yell49262 Snowy landscape with distant thermal pool. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49262.html yell49265 Thermal run-off stream contrasts with snowy landscape. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49265.html yell49266 Chromatic Spring in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49266.html yell49267 Hot springs and snow, Upper Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49267.html yell49268 Cross country skiers pass Chromatic Spring. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49268.html yell49320 Steam and forest in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49320.html yell49321 Gem pool seen from above, winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49321.html yell49324 Sapphire Pool in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49324.html yell49326 Family looks at thermal pool in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49326.html yell49328 Visitors walk over snow-covered boardwalk. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49328.html yell49329 Large group of visitors in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49329.html yell49330 Tree skeleton and thermal steam, Biscuit Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell49330.html yell5910 Yellow mineral deposits in a hot springs, Midway Geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell5910.html yell8803 Detail of colorful algaes, Biscuit Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell8803.html yell8804 Colorful algaes patterns, Biscuit Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell8804.html yell8810 Midway Geyser Basin along the Firehole River. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell8810.html