Lower Antelope Canyon
This narrow and short (400m) canyon attracts lots of photographers and sightseers with its scenic sections. It is located on Navajo land and entry is restricted to guided tours led by authorized guides.
Blue color seen on the photos taken in the canyon is not distinguishable with "naked" eye. Our human eyes accommodate to the low light conditions there and "ignore" the blue tones captured only by cameras.
Guide offers help with turning on filters on the phones. My photos in this post don't have any filters or post-processing and were taken as is.