I was in Turkey on a trip with my parents when I was in high school. I had to go to the bathroom and went into their public restroom. The urinal was a long wall with the floor slanted on both sides towards a drain. The toilets were LITERALLY small holes (maybe 10 inches in diameter) in the concrete floor with foot imprints on either side, I'm assuming where they think you should put your feet when you squat. I walked in, took a glance at the holes in the floor out of curiosity and started to head out when some dude just squatted down by one of the holes and started doing his business. I ran, not walked, out of there.
There's a restuarant here in New York that has one of those. You can watch people eat or something. It was in a recent issue of Time Out, if I can find article I will post.