There are none! Not the fancy ones at least.
Are you tired of peeing behind the bushes, only to have a mudcrab bite your precious bits? Doing those long Veteran Dungeons and not finding a place to relieve yourself so you just tell your team you'll be right back, and there you are, crouching in a corner.
Well, fear no more citizens! I have build one. And, it is functional.
Toilets In Tamriel. There are none!