Antelope Canyon is a well known photographers paradise. It is a "slot" canyon, very narrow at the top, often only a few feet, and from 3 to 12 feet or so wide at the bottom. At the right time of day, beams of light stream in creating dramatically beautiful moments. The canyons are carved by water and sand erosion over millions of years. Antelope Canyon is located on the Navajo Reservation near Page Arizona. It can only be visited with an authorized Navajo Guide. I recommend http://www.antelopeslotcanyon.com/about_us/chief.html. Our guide, Eugene Begay, was very knowledgeable and extremely helpful in getting the best shots.