December makes me think of John Lennon. If you haven’t been to Strawberry Fields, a memorial to him on Central Park West opposite the Dakota, it’s worth a trip just for that, especially in spring or early summer. Other parts of the park in that vicinity are interesting as well, and the Museum of Natural History is nearby.
A lot of people come through the area where this tiled circle has been inlaid. But for some strange reason, no music is allowed from early morning to about 4 p.m., when a caretaker leaves. Then people start showing up with instruments.