Noah’s Ark, America’s Largest Waterpark, is celebrating its 45th season this summer.

The premier Wisconsin Dells attraction first opened in 1979 under the name Noah’s Incredible Adventure which featured bumper boats and a go-kart track. Today, Noah’s Ark is home to 51 waterslides, two wave pools, two lazy rivers, and six additional attractions.

On May 27th, Noah’s Ark will begin celebrating its 45th anniversary by kicking off the fun on opening day and welcoming its newest attraction, the Chameleon, an all-new ride experience and first-of-its-kind in Wisconsin Dells.