From October, 2000 and just scanned. Structures at Hovenweep N'tl Monument, Utah/Colorado. No, the horizon is NOT CROOKED! lol... It is Sleeping Ute Mountain on the Ute Indian Reservation in SW Colorado. It is theorized smoke and other signals could be seen from Mesa Verde to Sleeping Ute (see the head? the knees?) to Hovenweep. Cooooooool area!! Look here for my color version: http://www.usefilm.com/editphoto.php?id=17521
I love pictures of this area. I got to spend some time around there once but was never able to get to Hovenweep. This needs some boost in the dark areas to reveal the light I know is there. Good luck and I hope you repost this as I would really like to see it.