Antelope Canyon, gently carved from the Navajo sandstone over the course of countless millenniums, the slot canyons are majestic. The canyon wall is over 100-120 feet high and only about 3-5 feet wide. It's on Navajo land, so you have to pay the natives a tour fee. However, our tour guide was outstanding, telling us: "stand here, shoot the floor up, shoot up, in 1 minute the sun's beam will be here", etc.