The Green Lake Aqua Theater was an outdoor theater located at Green Lake in Seattle, Washington. The Aqua Theater was built in 1950 for the first Seafair Summer Festival in order to house an attraction called the Aqua Follies and their "swimusicals" - a combination of aqua ballet, stage dancing, and comedy. The first ever performance at the venue was on August 11, 1950. The theater's stage was round, and the orchestra pit nearby was recessed and floating.