White Sands National Park
White Sands National Park is a national park of the United States located in New Mexico and completely surrounded by White Sands Missile Range. The park covers 145,762 acres (227.8 sq mi; 589.9 km2) in the Tularosa Basin, including the southern 41% of a 275 mi2 (710 km2) field of white sand dunes composed of gypsum crystals.
Source: Wikipedia — White Sands National Park (CC BY-SA 4.0)