Melissa Caruso tweeted this wonderful thread about the Lyrical Ballad Bookstore in Saratoga Springs, New York. They have been selling used books since 1971. It is in a labyrinthine building and is an absolutely magical bookstore as you can see by the photos in the thread:
Source: Melissa Caruso
Store: Lyrical Ballad Bookstore
Terry Pratchett wrote about this, saying that all bookshops and all libraries are connected via L-Space. If you have the clearance and training, you can find yourself in another city, country or even world.
PS that’s the kind of dangerous thing that can happen when you send a kid away to college (in this case, Skidmore).
Just like a literary Tardis!