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!
Subway cars from the green line with the famous "T" emblazoned on them? You don't ride the subway in Boston, you take the T. (Note: I'm not from Boston but Providence down the road... somebody who lives there will have a better idea)
Definitely include the T, you can look up a map of the different subway lines to determine what color the car should be, and it's only half underground. On some roads, cars drive on the T tracks. Architecture-wise, townhomes/apartment buildings with curved fronts are all over the place (look up brownstone buildings and the curvy front ones are what I'm talking about, I have no idea what the official name for that style is). Brownstone buildings themselves are quite common in the more historical parts of Boston. There is a college or university every 10 feet in central Boston, so it might be fun to float by Harvard or MIT. There are several famous graveyards dead in the middle of downtown Boston, it's always a bit surreal to see a graveyard in the center of a busy intersection, plenty of well-known statues (there's a wiki page for that) and interesting churches too. That's all I can think of for now, I only lived in Boston for a few years.
The Old Customs House. Faneuil Hall? Boston Common? Boston City Hall. The Old North Church (of "One if by land, two if by sea" fame) https://en.wikipedia.org/wiki/Old_North_Church
