Brooklyn Museum: First Saturday monthly free for Brooklyn residents with ID, otherwise $16. Take the 2/3 train to Eastern Parkway-Brooklyn Museum.

Museum of the City of New York: Sunday mornings free for NYC residents, $18 regular. Take the 6 train to 103rd Street, walk to Fifth Avenue.

New York Historical Society: Friday evenings 6-8pm free admission, $22 standard. Take the B/C train to 81st Street-Museum of Natural History.

Bronx Museum stays free always for everyone. Take the 6 train to 161st Street-Yankee Stadium, then Bx1/Bx2 bus to Grand Concourse.