I read that the design of Central Park's curving spaces was a Romantic counter to the geometry of Enlightenment-era gardens. I heard this design was influenced by landscape painting, where its foreground, middleground, and background constantly shift as you walk the paths. I find new pockets and features every time I'm there. One of my favorite spots is with the Central Park Dance Skaters, a group that roller skates in circles all day to vintage electro funk. These characters generously lend you the feeling of being in your own 1980's New York film.
Strand is a castle of books. It claims 2.5 million new and used books, across 18 miles of shelves, cared for by 200 employees—so set aside a couple of hours. Plenty of art books and good prices. Get your healthy huff of that old book smell.
The best underground shows you will find will have free pbr and models as far as the eye can see. They are rarely announced, so keep your eyes out for promising openings, especially with Milk Underground coming up.