The Luna-Lager bunker is all that's left of a forced labor camp on the site of a former amusement park in Schönholzer Heide, Berlin.

It ain’t much to look at, but now it’s home to bats who appreciate it much more than any humans ever did. Long may they thrive.

Photos below are from 2014 and 2019. It hasn’t changed much in the meantime, just there’s a big sturdy fence around it now.