Cliff Palace, Mesa Verde, 1898

Colorized photograph of the Cliff Palace, a sandstone structure built into an alcove in a cliff, Mesa Verde, Colorado, 1898. Built in the late 1100s, the structure was abandoned in the 1300s and was re-discovered several hundred years later; the area became a protected national park in 1901. The image, catalogued as number 53116, was published by the Photochrom Co. (Photo by Transcendental Graphics/Getty Images)