Hey all. I have a sort of dream-like scene, where my MC is diving through an underwater dream version of Boston. First off, I was wondering which details you think would be interesting for my MC to recognize, in order to realize that this is Boston (of course, I could use famous sites and buildings, but I'm hoping for something more unique and interesting, i.e street lamp design, manhole covers, etc.). Second, I would love to hear any ideas you have for specific places and things that would be cool and interesting while underwater (e.g the Charles isn't a river here, it's a gully. with sunken, Barnicle-covered boats at its bottom, and he will be swimming inside the sunken BPL, which will have tons of books floating around). Thanks a lot!