One of the most unusual opera festivals takes place annually in July-August in the city of Bregenz. How amazing is this event? The fact that the opera stage is located right on Lake Constance and is rebuilt every two years. At the same time, the fixed structure, made of concrete, does not change, it is fixed from the bottom of the lake on 200 piles, but the outer part of the scene is constantly being transformed. These structures include fitting rooms, an engine room, and an orchestra pit for the Vienna Symphony Orchestra.→