White Sands National Park is an American national park located in the state of New Mexico on U.S. Route 70 approximately 15 miles southwest of Alamogordo and 52 miles northeast of Las Cruces, in western Otero County and northeastern Doña Ana County. The park is situated at an average elevation of about 4,000 feet in the Tularosa Basin and comprises the southern part of a 275 sq mi field of white sand dunes composed of gypsum crystals. The gypsum dunefield is the largest of its kind on Earth
The Aztec Ruins National Monument in northwestern New Mexico, USA consists of preserved structures constructed by the Pueblo Indians nearly a thousand years ago. The national monument lies on the western bank of the Animas River in Aztec, New Mexico, about 12 miles northeast of Farmington. Additional Puebloan structures can be found in Salmon Ruins and Heritage Park, about 9.5 miles south. Archaeological evidence puts the construction of the ruins in the 12th and 13th centuries. The Puebloan-built ruins were dubbed the "Aztec Ruins" by 19th century American settlers who misattributed their construction to the Aztecs