The Sleeping Bear Dunes

The Sleeping Bear Dunes National Lakeshore on the northwestern shore of Michigan's Lower Peninsula features sand dunes rising up to 450 feet directly above the surface of Lake Michigan, the tallest freshwater coastal dunes in the world. The dunes were formed over thousands of years as glaciers deposited sand that winds then pushed into massive formations. Climbing the dunes looks deceptively easy from a distance. The climb to the crest typically takes 30 minutes, while the descent to the water takes about 5, and the climb back up has turned back thousands of underestimating tourists.

Source: U.S. National Park Service