I don't think you can go to New York without visiting at least a couple of museums (or at least you shouldn't *g*) There are tons to choose from so there should be something for everyone. We bought New York City Passes (which give you admission into 6 different attractions. Most of them were ones I was interested in going to so we got the pass :) This first one wasn't one of my choices but it was close to something else we were doing so we were there for a short visit.
The Intrepid Air/Space Museum ~ We didn't stay at this one for too long. It is probably very interesting for people who are into American military history. I'm really not so it was a little too much patriotism (This isn't coming out right but I don't know how to say it *shrugs*) for my taste. It was pretty cool though seeing how incredibly enormous an aircraft carrier is.
The American Museum of Natural History ~ I loved this museum. I was really only able to explore a small portion of it though. There just wasn't enough time! Ideally a person would have at least a couple of days to go through this museum. There is just so much to see. My favourite exhibits were the fossil halls. They were WAY too cool!
The Guggenheim Museum ~ I was a bit disapointed that they were doing renovations to the exterior of this building. That is half the fun of the Guggenheim .... seeing Frank Lloyd Wright's architecture. The interiour is amazing though. I don't think any of the photos I took will give it justice though (photography was only allowed at the entrance level). My favourite exhibition here was the Year With Children 2006 ~ Selected Works from Learning Through Art.
The Museum of Modern Art (MoMA) ~ Vincent Van Gough ~ The Starry Night and Claude Monet ~ Reflections of Clouds on the Water Lily Pond (and so many more). I could have sat and looked at these amazing paintings for a long long time. It's definitely someplace I'd visit again (should I ever get back to NYC)
.... and finally The Museum of Sex ~ Well I can't say that going to the sex museum was something I'd do again with my sister and brother in law *g* It was definitely ... different??? LOL I can no longer claim that I've never seen a porno... or at least portions of a number of pornos *snort*