White Sands National Park, New Mexico, USA.

Rising from the heart of the Tularosa Basin is one of the world's great natural wonders - the glistening white sands of New Mexico. Great wave-like dunes of gypsum sand have engulfed 275 square miles of desert, creating the world's largest gypsum dune field. White Sands National Park preserves a significant portion of this unique dune field and the plants and animals.