Mesa Verde National Park is probably the only US national park dedicated to protect archeological treasures. The main attraction of this park is the numerous (>500) cliff dwellings in which the Ancestral Pueblo people built and lived from 600 AD to 1300 AD. This unique park is celebrating its 100th anniversary in 2006.
Mesa Verde National Park has been a UNESCO World Heritage Site since 1978.
Mesa Verde National Park is located at southwestern corner of Colorado, near the town of Cortex. The elevation of much of the park is over 7000 ft or 2100m.