Matt and Al explore the stunning White Sands National Monument

As TODAY’s special series celebrating 100 years of the National Park Service continues, Matt Lauer and Al Roker share the natural wonders of White Sands National Monument in New Mexico: 275 square miles of white sand only 90 minutes from El Paso, Texas. It is the largest field of dunes composed of gypsum crystals in the world – and sliding down them is encouraged.