Stone steps on trail in forest with fall foliage, Gulpha Gorge. Hot Springs National Park, Arkansas, USA. http://www.terragalleria.com/parks/np-image.hosp38344.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 Harding Icefield trail passing through a young forest. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36773.html Trail and trees in fall colors, Gulpha Gorge. Hot Springs National Park, Arkansas, USA. http://www.terragalleria.com/parks/np-image.hosp38338.html Boardwalk in rain forest. Pacific Rim National Park, Vancouver Island, British Columbia, Canada http://www.terragalleria.com/north-america/canada/pacific-rim/picture.cabc30247.html Trail in autumn forest. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39858.html Hiker on trail amongst fall colors, Hot Spring Mountain. Hot Springs National Park, Arkansas, USA. http://www.terragalleria.com/parks/np-image.hosp38300.html Visitor standing at the base of tall redwood trees. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30539.html Meadow with flowers and historic cabin, Never Summer Ranch. Rocky Mountain National Park, Colorado, USA. http://www.terragalleria.com/parks/np-image.romo6012.html Tourists walking on trail amongst redwood trees. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30526.html Path and historic cabin at Never Summer Ranch. Rocky Mountain National Park, Colorado, USA. http://www.terragalleria.com/parks/np-image.romo6013.html Paved trail and forest in fall foliage. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39881.html Trail covered with fallen leaves. Mammoth Cave National Park, Kentucky, USA. http://www.terragalleria.com/parks/np-image.maca39855.html Tourists near the tree named Mother of the Forest, a 329 foot high tree. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30520.html Tourists standing amongst redwood trees. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30525.html Boardwalk, South Beach trail. Pacific Rim National Park, Vancouver Island, British Columbia, Canada http://www.terragalleria.com/north-america/canada/pacific-rim/picture.cabc30238.html Boardwalk in rain forest. Pacific Rim National Park, Vancouver Island, British Columbia, Canada http://www.terragalleria.com/north-america/canada/pacific-rim/picture.cabc10896.html Path leading to historic abin, Cades Cove, Tennessee. Great Smoky Mountains National Park, USA. http://www.terragalleria.com/parks/np-image.grsm6768.html Tourists amongst redwood trees. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30527.html Boardwalk and trees in rain forest. Pacific Rim National Park, Vancouver Island, British Columbia, Canada http://www.terragalleria.com/north-america/canada/pacific-rim/picture.cabc10897.html Family walking on forest trail. Olympic National Park, Washington, USA. http://www.terragalleria.com/parks/np-image.olym30153.html Tourists look at redwood trees. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30523.html Hiker on trail. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30519.html Built trail and fall colors, Hot Spring Mountain. Hot Springs National Park, Arkansas, USA. http://www.terragalleria.com/parks/np-image.hosp38299.html Treetop trail. Vancouver, British Columbia, Canada http://www.terragalleria.com/north-america/canada/vancouver/picture.cabc30407.html Davis House, Mountain Farm Museum, North Carolina. Great Smoky Mountains National Park, USA. http://www.terragalleria.com/parks/np-image.grsm39951.html