General view of the "Pavillon of Reflections" on Lake Zurich in Zurich, Switzerland May 27, 2016. The floating pavillon, which includes an open-air cinema and a swimmingpool will be used as event location during the Manifesta 11 - European Biennial of Contemporary Art from June 11 to September 18. REUTERS/Arnd Wiegmann

A woman takes pictures of the "Pavillon of Reflections" on Lake Zurich in Zurich, Switzerland May 27, 2016. The floating pavillon, which includes an open-air cinema and a swimmingpool will be used as event location during the Manifesta 11 - European Biennial of Contemporary Art from June 11 to September 18. REUTERS/Arnd Wiegmann

Workers stand on a ponton in front of the "Pavillon of Reflections" on Lake Zurich in Zurich, Switzerland May 27, 2016. The floating pavillon, which includes an open-air cinema and a swimmingpool will be used as event location during the Manifesta 11 - European Biennial of Contemporary Art from June 11 to September 18. REUTERS/Arnd Wiegmann

People sit in front of the "Pavillon of Reflections" on Lake Zurich in Zurich, Switzerland May 27, 2016. The floating pavillon, which includes an open-air cinema and a swimmingpool will be used as event location during the Manifesta 11 - European Biennial of Contemporary Art from June 11 to September 18. REUTERS/Arnd Wiegmann