This photo is from famous Antelope Canyon.
Actually there is upper and lower Antelope Canyon and my photo is from more touristic (and nicer as they say) upper canyon. You can go there only with a guide, who is a local Navajo tribe and also entrance fee goes to them.

Please click on the image to enlarge

Link to original post:
https://steemit.com/photofeed/@crazy-andy/antelope-canyon