Metropolitan Museum of Art

Visitors per year: More than 6 million
The draw: One of the world's most comprehensive art museums, with nearly 2 million works of art from five millennia of human history
Highlights: Popular permanent exhibitions include the American Wing, Egyptian Art—especially the cavernous room devoted to the Temple of Dendur—and Medieval Art. The museum's suggested itineraries are helpful for those who don't know where to start. You can find information on current exhibitions on the museum's website.
Best time to beat the crowd: Around 11am, once the opening lines have dissipated.

Източник: http://www.nycgo.com/articles/the-big-5-most-visited-museums-in-nyc