123Movies. Seebühne (or floating stage), with its 7,000 seat open-air amphitheatre, is the location for the French composers most successful opera. With a set designed by British artist Es Devlin, who has designed sets for stars such as Adele, U2, Take That and Kanye West, the stage sits on the water near the shores of the stunning Lake Constance in Austria. This romantic and dramatic setting regularly welcomes opera lovers from all over the world, where the productions are extravagantly original and innovative and frequently use the waters of the lake as an extension of the stage.