White Sands National Park in New Mexico is home to the largest gypsum dune field in the world, covering 275 square miles. Unlike typical sand made of quartz, the dunes here are composed of soft, white gypsum crystals. This unique composition keeps the sand cool to the touch, even in the hottest summer months, as gypsum does not absorb heat like other minerals. The ever-shifting dunes, sculpted by wind and water, create a mesmerizing and constantly changing landscape, making White Sands a truly one-of-a-kind destination for visitors and researchers alike.