This is one of the most ambitious design hotels in the world. Why have one or two prize-winning architects when you can have 19? Creative freedom is the ethos of the hotel which cost an estimated 75million Euro to finance. Each architect was given a free reign over one floor or feature of the hotel. So each of the 12 floors are magnificently different. The Plasma Studio took over the fourth floor creating rooms with stunning geometry and hallways that resemble the inside of a foil tube. The first woman to win the Priztker Prize (the Nobel Prize of architecture), Zaha Hadid has designed the first floor full of sinuous lines and flowing spaces. Another Priztker Prize winner, Oscar Niemeyer has created a sculpture for the car park. Some architects have created spaces that resemble a bathhouse, or take influence from Japanese Zen; either way, you are guaranteed to be awe-inspired when spending the night in these unique spaces.