Bruneau Dunes State Park

Bruneau Dunes State Park is a public recreation and geologic preservation area featuring large sand dunes and small lakes, located northeast of Bruneau and fifteen miles (24 km) south of Mountain Home, Idaho. The state park is the site of North America's highest single-structured sand dune which is approximately 470 feet (140 m) high. The park encompasses 4,800 acres (1,900 ha) and features the Bruneau Dunes Observatory, where visitors can use a telescope for stargazing.^[1]

• http://en.wikipedia.org/wiki/Bruneau Dunes State Park