Tuesday, May 18th is International Museum Day where many museums fling open their doors and invite the public free of charge or at discounted admission. 13 NYC museums are participating, although some of them are taking part on different dates. Take advantage of free admission at some of NYCs best museums this weekend and next week.

Here's a list of participating museums and what they're offering:

All offers are for May 18th unless otherwsie noted.

American Folk Art Museum, Free plus 10% discount in museum store

Asia Society Museum, Free

El Museo del Barrio, Free (on May 19th)

Frick Collection, Free

Guggenheim, Buy one ticket, get second at half price

Japan Society, Free (Check out Heroes and Monsters exhibit review)

Jewish Museum, Free (on May 22)

Metropolitan Museum of Art (suggested donation as always, plus get 10% off store purchases and a free gif with any purchase.

Museum of Modern Art, Discounted admission

New Museum, Free (on May 19th)

Studio Museum in Harlem, Free (on May 19th)

The Noguchi Museum, Free (on May 15th and 16th)

Whitney Museum, (on May 19th) buy one ticket and get the second half off.