Chimney Rock. Photo: USDA.gov/Flickr
On Friday, President Barack Obama signed a proclamation designating 4,726 acres of land in southwestern Colorado as Chimney Rock National Monument. Roughly 1,000 years ago, the Chaco civilization built more than 200 homes and farmed the land in this area, which is marked by two large rock spires at an elevation of roughly 7,600 feet. Once every 18.6 years, the moon rises between those two spires, Chimney Rock and Companion Rock, creating a moment known as a lunar standstill. Peregrine falcons, mule deer, and mountain lions live in the ponderosa pine, juniper, and pinon environments around the spires.