White Sands National Park: The Desert That Moves Like Water. White Sands National Park protects the largest gypsum dune field on Earth. Trapped minerals, constant wind, and a closed basin allow the dunes to move year after year, creating a rare desert landscape that continuously reshapes itself. #nationalpark #hiddenhistory #parkhistory #americanhistory #whitesands national park history, hidden history, American history, documented stories, public lands, White Sands National Park, gypsum dunes,