There are several National Park Service sites that do something that very few places on earth can do. They stop you righ ...

They may look like mounds of snow, but the dunes in this park are made of a rare form of crystallized gypsum ... Hiking and sledding over this vast white expanse of powder is a singular, otherworldly ...

Clambering up gypsum sand dunes in White Sands National Park in New Mexico, I half expected to see Will Smith dragging an ...