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Matt and Al explore the stunning White Sands National Monument

05:09

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.