"Home to Witches festival"
It's not exactly a "great" hill, but Central Park Great Hill is definitely a hill. It's a little far north for my blood, so I don't come here a lot. It's right next to the 103rd street stop on the west side so access to the Hill is pretty easy. The only thing I can think of as far as things to do on Great Hill (outside of normal park things) is the yearly Wiccan festival. Yep, that's right, witches. They have a big celebration in the summer. I went one year because I enjoy watching weird things and it was pretty awesome. They do a maypole, and chant and jump over cauldrons and stuff. I was surprised at how many witches live in New York . . but, I don't know why I was surprised, it is New York, afterall. It was actually pretty cool and made for an interesting afternoon involving things I don't do in a part of town I rarely visit. All of Central Park is beautiful, but if you have a reason to trek over here, or live in Morningside, the Great Hill is a cool thing to see.