The U-Bahn in Vienna is certainly a sensation. It is like stepping into a version of the future that was imagined 30 years ago. Each of the five U-Bahn lines has it's own bright color and unique set of design elements. Many trains have a brushed aluminum look and are lined with bright orange plastic inside. The best part to me is the sense that it doesn't take itself too seriously. There is a theme park sense of fun, though maybe that's because this brain grew up on Star Wars and (the first) Battlestar Galactica.