Scheduled to open in 2012, the Aquatoria in Donetsk, Ukraine is the world's largest retractable aluminum dome waterpark. At 26m / 86' high and 85m / 278' in diameter, the unique retractable design makes it the first park of its kind. OpenAire's approach of using aluminum offers a number of benefits for water parks. Unlike steel, aluminum doesn't corrode, doesn't need to be painted, withstands chlorine, and requires zero maintenance. In addition, the retractable dome roof offers year-round enjoyment.