Ars Electronica Center
Just across the Nibelungen Bridge from the Hauptplatz, this highly acclaimed "Museum of the Future," opened in 2009, pays tribute to the confluence of art, technology, and society. Permanent features at the museum include the 3-D cinema room, which allows you to fly over Renaissance cathedrals or explore ancient civilizations, as well as exhibits on the latest developments in robotics and the origins of the universe—all with English explanations. As well as its permanent exhibits, the center also hosts annual festivals, with a different theme each year. Allow at least half a day to experience all the cybersites here. When you need a break, visit the Cubus Café Restaurant Bar on the third floor for refreshments and a spectacular view overlooking the Danube and Lentos Kunstmuseum opposite.