Rattlesnake Slot Canyon Arch
I believe this is the small arch in the back of Rattlesnake Slot Canyon. This slot canyon is near Antelope Canyon and is part of the photographic tour led by Carol BigThumb.
I was able to achieve these fantastic colors by using some creative white balance. Read my article on custom white balance settings to learn more!
http://mikehphoto.blogspot.com/2012/06/experiment-with-custom-white-balance.html