Spain: Hotel Puerta America, Madrid

The Hotel Puerta America is a showcase of modern architecture. Each of the twelve floors was designed by one of today's top architects: Zaha Hadid, Norman Foster and the Plasma Design Team, to name just a few.

The architects were given free reign -- and so it comes as no surprise that the hotel cost 75 million Euros to build. But it gives guests the opportunity to stay for a night in an architect's dream, for around 350 Euros.

We venture floor by floor, to see white beds that appear to ooze from the walls, survive spiky metal endtables that bite and discover why visitors might want to check their baths for movie murder weapons before locking the door.