Having lost Taipei 101 to Burj Dubai as the tallest building in the world, Taiwan has another boggling idea, a 390-metre observation tower in the central city of Taichung that will look like a twisted tree of free-hanging elevators. Sounds crazy? But anything is possible in the quirky world of today's architecture, where buildings rotate, float, bend, or flow at the designer's will; and some of the weirdest, ultra-futuristic new ideas are being tried out in Asia for the first time.