On the topic of great shithouses, I highly recommend the 2023 Japanese drama Perfect Days. It's about a quiet man that works for Tokyo Toilets, cleaning a set of architecturally interesting public toilets around the Shibuya district. The movie itself is compelling -- a fascinating study of a man and purpose, very similar to Paterson (2016)[1] -- but the whole thing is like taking a trip to Tokyo, with an enormous number of gorgeous shots of fascinating scenes. Also a lot of shots of someone cleaning toilets.

[1] The directors of both movies are friends, and interestingly Paterson ends with the protagonist talking to a man from Tokyo who came to visit Paterson, as a poetry fan of William Carlos Williams. It is coincidence, but it does make it feel like they're the same universe.