Watch full movie online. Opera on the Lake: “The Magic Flute” with an Enchanting Natural Backdrop One of the most frequently performed Mozart operas is the highlight of this year’s Bregenz Festival. “The Magic Flute” is performed on the world’s largest lake stage – with its impressive oversized stage setting with Lake Bodensee as a backdrop, it provides an enchanting frame for the love story between Tamino and Pamina.