This is one my photos I took during a hike from the Karlstejn Castle to Velka and Mala Amerika (Big and Small Americas) - two abandoned and partly flooded quarries located in the Central part of the Czech Republic near the Morina village. I am not really sure which one of the two is it, we visited the place several years ago. I can only remember it was beautiful :)
I think your photo is from Little America :)