Mesa Verde National Park

MESA VERDE, CO - AUGUST 07: Cliff Palace, Mesa Verde�s largest cliff dwelling, is available for visitors to take a one hour, ticketed, ranger guided tour at Mesa Verde National Park on August 7, 2008 in Mesa Verde, Colorado. Mesa Verde, Spanish for green table, offers a spectacular look into the lives of the Ancestral Pueblo people who made it their home for over 700 years, from A.D. 600 to A.D. 1300. Today, the park protects over 4,000 known archeological sites, including 600 cliff dwellings. These sites are some of the most notable and best preserved in the United States. (Photo by Doug Pensinger/Getty Images)
Mesa Verde National Park