These stunning pictures show the caves where the ancient Anasazi people lived in America thousands of years ago.
Amateur photographer Wayne Pinkston snapped the astonishing images around the south-west of the U.S.
The pre-Columbian Anasazi civilisation lived in the alcoves because they could be easily defended.
But they suddenly abandoned their homes around 1300AD, and never came back.
Virginia-based Mr Pinkston said it was “enthralling” and “very primal” to “look out and see the same thing they did so long ago.”
“Being in these ruins at night is fascinating. To see the starlit sky, and be surrounded by ancient habitations where people once thrived is magical,” he wrote on his Flickr account.
“It’s like going back in time. The alcoves just glow with the light. You can imagine the glow of fires illuminating the ceiling and walls centuries ago,” he added.
The people lived in the area from around 200AD until 1300AD, when the disappeared.
Some researchers speculate that they migrated elsewhere, with others thinking they left because of drought.
(Pictures courtesy of Caters News Agency)