New York City is known for its many great museums, and if you’re bored in NYC, a museum is a great way to kill some time, take in some culture, and learn some history.

While many museums throughout the city are completely free, or pay-what-you-wish (or “suggested donation”), many of the most-popular museums—such as the Museum of Modern Art and the Guggenheim—do charge an entry fee. What many don’t know, however, is that most museums set aside a certain day of every week and offer free admission to the general public. It’s just a matter of showing up at the right time on the right day!

Listed below alphabetically are some of the most popular museums in Manhattan, Brooklyn, and the Bronx, their usual entry fee, and what time (if any) admission is free:

Museum Adult Admission Free Museum Days
Museum Adult Admission Free Museum Days
American Folk Art Museum
45 West 53rd St.
$12 Friday after 5:30pm
American Museum of Natural History
Central Park West at 79th St.
$16 suggested Every day, pay-what-you-wish
Bronx Zoo
2300 Southern Boulevard, Bronx
$16 Wednesday, pay-what-you-wish
Brooklyn Botanical Garden
900 Washington Avenue, Brooklyn
$8 Tuesday; free every day in winter
Guggenheim Museum
1071 Fifth Avenue
$18 Saturday after 5:15, pay-what-you-wish
Metropolitan Museum of Art
1000 5th Avenue
$20 suggested Every day, pay-what-you-wish
Museum of Modern Art (MoMA)
11 West 53rd Street
$20 Friday after 4:00pm
Whitney Museum of American Art
945 Madison Avenue
$18 Friday after 6:00pm, pay-what-you-wish