This public toilet was created by an artist in Switzerland as an experiment. People feel comfortable with other people they may not know well seeing them doing some private things, but not others. Going to the bathroom is one of those others. The first photo is of the public toilet seen from the outside, constructed of the type of glass used to observe without being observed.
In the second image you can see how it looks being inside. You wonder...can they really see?
Snopes goes into more detail and the images can be made larger there but copying a teaser phrase from the site isn't allowed so go to SNOPES to read the article. I was searching for another urban legion when this came up in the choices. This one isn't an urban legion. It's true.