Construction of the biggest aluminum-domed indoor waterpark is near completion in Donetsk, Ukraine, paving the way for an exciting new entertainment venue that’s unlike anything Europe has seen before. The 61,000ft²  / 5,667m² Aquatoria, slated to become the largest retractable aluminum-domed indoor waterpark in the world, is being built by Canadian company OpenAire, Inc., a premier designer, manufacturer and installer of beautiful, innovative and energy efficient retractable roof enclosures and operable skylights.