Refugees.
Welcome to New York, Sydney! My name is Mordecai. The Met and the Whitney are popular for good reason. I would also reccomend the National Jazz Museum in Harlem and the Museum of the Moving Picture. I'll second Mr. Pevensie's recommendation of the space travel museum. I don't know what your world is like, but it's particularly useful for those of us accustomed to the horseless carriage as the most advanced method of transportation.