The 275 square miles of desert makes White Sands the world’s largest gypsum dune field, according to the National Park Service. Gypsum is a common mineral in rocks around the world and is ...

The White Sands National Park is a natural wonder, a desert in New Mexico, USA. It is a field of white dunes (275 sq mi/700 sq km) formed of white gypsum crystals. The desert is the world's ...