For some hotel designers, building a soft place to rest your head is apparently too easy. They're experimenting with converting prisons into hostels, plopping lux bedrooms into public restrooms, and submerging guest rooms underwater. Below, a collection of some of the most extreme global hotel concepts of the past few years, assembled by Reuters.
A couple are snug inside a sleeping bag at an ice hotel at Alpha Resort Tomamu's ice village in Shimukappu town, Japan's northern island of Hokkaido on February 6, 2008. (Yuriko Nakao/Reuters)
Local Manager Gisela Olsson makes a bed in the Jumbo Hostel at Arlanda Airport, Stockholm on January 14, 2009. Jumbo Hostel is a Boeing 747-200 jumbo jet that has been converted into a 25 room hotel and cafe and the cockpit has been converted into a de luxe suite. (Fredrik Sandberg/Reuters)