This is a small hidden overhang near the Purgatory River in Colorado that may have been a cliff dwelling or sheep-herder's shelter. The entire area around Comanche National Grasslands is rich with history. And if you look carefully above you can see swallows have used it for shelter as well. I stumbled on this, it wasn't on any maps and I know nothing of it's true history, so it remains a mystery.
landscapenaturearcheologyculturecaveshelterswallowsnestsswallow nestshistorypurgatory rivercoloradomysteryoverhangirresistiblebeautypurgatoire riverpurgatoirepurgatoire river basinseco2007southeast coloradograsslandgrasslandsprairiemichael menefee