Chimney Rock National Monument is a 4,726-acre (1,913 hectare) U.S. National Monument in the San Juan National Forest in southwestern Colorado which includes an archaeological site. This area is located in Archuleta County, Colorado, between Durango and Pagosa Springs, and is managed for archaeological protection, public interpretation, and education. The Chimney Rock Archaeological Site has been listed on the National Register of Historic Places since 1970. U.S. President Barack Obama created Chimney Rock National Monument by proclamation on September 21, 2012 under authority of the Antiquities Act.
Information from:
en.wikipedia.org/wiki/Chimney_Rock_National_Monument 