Upper Antelope Canyon is certainly the most fascinating slot canyons. Even though it is neither the closest nor the longest (only 400m), or the deeper, this is the only one which penetrates the middle of the day (in summer) a thin streak of light which then transforms the place into a true artistic gallery. Carved by water with incredible forms cliffs renvoies then this light to reveal an amazing palette of colors gold, orange, red, gray and white.

(from : http://www.ouestusa.fr)