If you haven’t heard, Austin’s beloved Zilker Park turns 100 this year, and the celebrations kick off on Sunday, April 9 with the park’s first-ever free day. That’s right—you get free access to Barton Springs Pool, the Austin Nature and Science Center, the Umlauf Sculpture Garden and Museum, Zilker Botanical Garden and the Zilker Zephyr all day Sunday.

Chuy’s flagship location on Barton Springs Road.

Zilker-area restaurants are getting in on the action, too: Several restaurants on Barton Springs Road will donate a portion of the day’s sales to the Zilker 100 campaign, which will help fund future improvements in the park. Participating restaurants include Chuy’s, Shady Grove, JuiceLand, Sno-Beach, SquareRut Kava bar, and Juliet. Trudy’s trailer will also be participating by giving out free waters per purchase for guests to take along as they enjoy Free Day activities.

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PHOTOS: Zilker Park turns 100