11 Most Endangered Historic Places

Archaeological Treasures of the Colorado Plateau

Year Listed: 1995
Location: Colorado
Threat: Public Policy, Development


A rugged expanse of dramatic beauty and rich history, the Colorado Plateau encompasses approximately 130 million acres in an area of Arizona, Colorado, New Mexico and Utah known as the "Four Corners." The region contains one of the world's richest concentrations of prehistoric ruins, rock art and artifacts, many of them offering clues to the lifestyles of the ancient cultures that once inhabited the area – ancestors of the modern tribes that continue to inhabit the plateau.