Photo: ajay_suresh, CC BY 2.0 via Wikimedia Commons
Another conservatory of music.
The Manhattan School of Music (MSM) is a private music conservatory in New York City. The school offers bachelor's, master's, and doctoral degrees in the areas of classical performance, jazz performance, contemporary performance, composition, and conducting, as well as a bachelor's in musical theatre.
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A large and historically important Protestant church and center of progressive social activism. Also neo-Gothic.
Grant's Tomb
General Ulysses S. Grant and his wife are buried in this imposing mausoleum, the largest tomb in North America. If you come when it is closed, you can still see the impressive facade, but coming during open hours gives you the opportunity to view the murals, the tomb and various documentation inside. Across Riverside Drive, there is a viewpoint to look across the Hudson River, a museum, gift shop and restrooms.
Miller Theater is Columbia University's main performing arts venue and is well known for its classical music performances.
A famous Ivy League college that has existed since British colonial times, when it was called King's College. The campus is closed to non-affiliates. To visit the campus, you will need a guest pass issued by a Columbia affiliate or sign up for a campus tour.