This ramshackle wooden hut on the edge of Obersee Lake in Germany is something of a mystery. It's in a remote location, and nobody knows who built it. The local authorities say that nobody ever asked for permission to put it there, and they have no record of its construction.
Our best guess is that it once provided shelter for some fishermen (or perhaps even one fisherman) who liked the seclusion and privacy of the lake - but it looks like it's been years since their last visit.