Hikers standing on Mist Trail below Vernal Fall. Yosemite National Park, California, USA. http://www.terragalleria.com/parks/np-image.yose46548.html Hikers walking through rainbow, Mist Trail. Yosemite National Park, California, USA. http://www.terragalleria.com/parks/np-image.yose46546.html Hikers on shore of Jordan Pond. Acadia National Park, Maine, USA. http://www.terragalleria.com/parks/np-image.acad44829.html Backpackers on Mist Trail. Yosemite National Park, California, USA. http://www.terragalleria.com/parks/np-image.yose46549.html Couple hiking holding hands in fog. Jeju Island, South Korea http://www.terragalleria.com/asia/south-korea/jeju-island/picture.skor51983.html Boardwalk and fog, Eorimok trail, Mount Halla. Jeju Island, South Korea http://www.terragalleria.com/asia/south-korea/jeju-island/picture.skor51988.html Backpackers on trail in fog, Hallasan. Jeju Island, South Korea http://www.terragalleria.com/asia/south-korea/jeju-island/picture.skor51984.html Boardwalk trail in frozen landscape, Hallasan. Jeju Island, South Korea http://www.terragalleria.com/asia/south-korea/jeju-island/picture.skor51989.html Frozen path and fog, Yeongsil trail, Hallasan. Jeju Island, South Korea http://www.terragalleria.com/asia/south-korea/jeju-island/picture.skor51993.html