Great Sand Dunes National Park
Location: Colorado
Established: Sep. 13, 2004
Size:130 square miles
Visitors in 2010: 283,284
The main dunefield in the park is 30 square miles and contains the tallest dunes in North America, with the Star Dune topping the list at 750 feet. Scientists estimate the dunes began forming 440,000 years ago.
Images: Above: USGS/NASA. Below: GeoEye.
Backlink: http://www.wired.com/wiredscience/wp-content/gallery/national-parks-from-space/sanddunesnp1_1.jpg
