El Capitan in Yosemite National Park (California) glows at sunset. This effect is known as alpenglow, and it commonly occurs Yosemite during the winter months. iPhone photo by Kari Cobb.
Sunset View of the Continental Divide, Glacier National Park, Montana. Been there and it is this beautiful!
Hiking the Narrows at Zion National Park. One of the coolest National Parks out west.
Subway pools | Utah Zion National Park
Vernal Falls. Yosemite National Park, California.
Mammoth Hot Springs Geyser, Yellowstone National Park, Wyoming; photo by Marcie Gonzalez
Well of Secrets, Zion National Park, UT by Shane McDermott
Yellowstone National Park "Fire" Waterfall by B-Cause, via Flickr
Indian Creek Falls, Great Smoky Mountains National Park, USA
Great aerial shot of Braemar Castle, Cairngorms National Park, Aberdeenshire, Scotland