The Hudson River Museum, located in Trevor Park in Yonkers, New York, is the largest museum in Westchester County. While often seen as an art museum due to the extensive collection of works from the Hudson River school, the museum also features exhibits on the history, science and heritage of the region.
(from the Hudson River Museum's wiki.)
The Hudson River Museum also includes a Planetarium, and boasts one of the largest collections of Hudson River School artwork anywhere in the world- almost 18,000 pieces.
There museum also has a full, diverse events calendar. There's regular live music, family oriented science and art workshops, and regular painting and drawing nights.
Want to learn more about the museum or plan a visit? Head here.