Images capture epic beauty of America's national parks

Kayaking tour of the Pictured Rocks in beautiful Northern Michigan. (Courtney Kotewa)

The Keyhole: We launched a canoe from the pack ice on Meyers Beach, and broke skim ice and dodged floating ice chunks out to the sea caves. We were well rewarded for our efforts. Amazing. This image was made from the canoe, looking through a porthole as the sun set on Mawikwe Bay. (Michael DeWitt)

Hiker in Pool Canyon - reflection of a hiker in a pool, but gives the illusion of a hiker walking along the edge of a cliff. (Darrell Staggs)

Hiking down from High Dune, the second tallest dune in North America, after being caught seriously off guard by a sandstorm near the summit. (Eric Magayne)

Cliff Palace, the largest cliff dwelling in North America, in Mesa Verde National Park, Colorado, July 2013. (Sarah Malerich )

The Morning Hues. (Manish Mamtani )

"Camouflaged" Eastern Screech Owls like to take over woodpecker nests that have been dug out over the years in pine trees, which are the main species of tree at this swamp. Fish and wildlife also paint a white ring around the base of a tree that has active nests in order to avoid when conducting controlled burns. Screech owls can range in height anywhere from 8-10 inches, so you have to have a sharp eye to find these little birds of prey. (Graham McGeorge)

Island in Kenai Fjords National Park with glaciers in background. (Michael McRuiz)

Three friends enjoy sunrise over the Grand Canyon. This view was definitely worth getting up early for. ( Peter Blanchard )

Girl jumping over the sand dunes near Stovepipe Wells. (Linnea Charnholm )