Those used to be very common in Italy, and you still find them... a porcelain surround in the floor with two footprints cast in it. We just discussed this in Miles Buzz under a thread about wood grain patterned floors in new Song planes.

The worst I saw was behind a very good trattoria which I used to frequent. You'd go though the kitchen, out the back, and to the bathroom in a cement out-building. It combined that floor hole with a shower. The shower head was directly above the hole, it leaked and dripped, and the water dripping on you was rusty. So you could stand in the footprints and shower, or squat in them and shower

For a couple months in 1977 I rented a room in the pensione above the restaurant, so I'd just go upstairs. Of course, there it was one bathroom per floor, and the 2 gallon shower tank had enough hot water to last about 38 seconds.