The setting sun outlines the ridges of the sand dune formations at the Great Sand Dunes National Park in Southern Colorado. Rising 750 feet from the valley floor, these are the tallest dune formations in North America.
Taken 09-23-12 Alamosa County, CO

Max Size: 36x72 REF # : BW-3532 R-3 D3X 70-200MM

Max Wallpaper Size (hgt x wide) is : 72x144 inches