Museum of the City of New York
Learn all about art and history of the city you're in at the Museum of the City of New York. Wander in and out of recreated and furnished rooms from the John D. Rockefeller home, or peruse through the Cityscapes collection, which documents New York's transformation into the metropolis it is today. Definitely take advantage of free admission through the Museum Mile Festival - typically an admission fee is required.
Museum of the City of New York, 103rd Street and Fifth Avenue
[Photo via @museumofcityny]