A beautiful and abandoned New York subway station from 1904, complete with chandelier. Take the 6 train heading downtown. When the train makes its final stop at the “Brooklyn Bridge/City Hall” station, passengers are told to exit the train. Stay on the train and duck down so as not to be easily spotted. When the train departs the station, it will pass through the abandoned City Hall Station.
If you're far up in Greenpoint and need caffeine + snack, Bakeri is my spot (I say "bake-ery", others say "bach-ery"—I still vote the former). Known for their baked goods—both savory and sweet—it's the perfect spot for a coffee meeting, small breakfast, or a solo book read. There's one large communal table in the center, plus a few two-tops and decent counter space—one of the rare cafes with enough room that it's rarely packed (except saturday!).
Joseph Leonard is one of my favorite cozy spots for brunch on the weekend. After a long week of work their avocado toast and a bloody mary hits the spot. Get there early or expect to wait, it's small and limited seating. Their sister restaurant Jeffreys Grocery across the street is also very good, but no expresso drinks which and I need my morning latte.
My favorite restaurant to pop in spontaneously on a weeknight. Get the lamb burger with sardines and a mezcal negroni. It also has my favorite looking bathroom in NYC.