On the border between the Hopi and Navajo Indian Reservations in the vast desert of northeast Arizona, Coal Mine Canyon is a long way from any famous attraction and is not signposted in any way yet has become quite well known because of the amazingly colorful formations that line the upper end of the ravine. The canyon is one of many remote, little-visited sites in the Southwest where the main interest comes from the detail of the rock - the colors, forms and textures of the eroded sandstone