The Qbic Hotel in Amsterdam opened in 2007 and features a cube-shaped room, television, safe and internet connection / supplied

Stay in a drain pipe at the Dasparkhotel in Germany / supplied

Capsule hotels are all the rage in Japan and give business people a place to sleep / Flickr user Fletchy182

The Yotel is a tiny hotel room located at Heathrow Airport, London, or Schipol, Amsterdam that can fit two people and includes a pull-down working desk and room service / supplied

New York City's Jane Hotel features standard and bunk-bed cabins of less than five square metres / AP

The Cedar Creek Treehouse is built in a cedar tree in Washington, US / supplied

New York's Pod Hotel has tiny rooms / supplied

Minute Suites opened last year at Hartsfield-Jackson Atlanta Airport, US, offering a sofa, television, chair and desk - but no toilets / support