If the cliches were true -- bigger was truly better and the devil resided in the details -- than the world's smallest hotel rooms might also be its least appealing. They aren't.

Well, most of them aren't anyway.

As cities turned into metropolises and metropolis became megalopolises, space became incredibly valuable. It is no small wonder that some travelers are deciding that they don't want to pay extra for a walk-in closet in a room they'd use for one night. The logic is sound even if the results can be quite confining.

The world's most famous tiny rooms are, without a doubt, the cubbies offered by Japan's capsule hotels. Though they make the list, what may be more interesting is the rooms they've inspired, which seek to combine their efficiency with the comfort of decor less reminiscent of the inside of a toaster oven. These are the next wave of micro-suites and they are coming to a city (and airport) near you.

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  • Nakagin Capsule Tower, Tokyo

    The Nakagin Capsule Tower in Tokyo's Ginza district is notable not only for its tiny rooms but for its <a href="http://www.alafista.com/2012/07/24/todays-japan-photo-nakagin-capsule-tower/">unsettling, distopian facade</a>. Aldous Huxley would feel right at home.

  • The Jane Hotel, NYC

    New York's Jane Hotel combines cozy with compact by <a href="http://www.thejanenyc.com/#/rooms/1">offering travelers "cabins" </a>reminiscent of rooms on a yacht. The wood panelling and dark interiors are reminiscent of a whiskey commercial even if the shared bathroom harken back to freshman year. Yes, bunk beds are available.

  • Capsule Ryokan, Kyoto

    Kyoto's Capsule Ryokan combines the relaxation of the spa experience with the anxiety that comes from sleeping in a toaster oven. On the plus side, <a href="http://www.capsule-ryokan-kyoto.com/en/pages/facilities.html">it looks like a futuristic prison.</a>

  • Yotel, Heathrow

    <a href="http://www.yotel.com/hotels/london-heathrow">Heathrow's Yotel</a>, like the Sleepbox, is designed to help travel weary fliers get some shut eye before the next leg of their trip. The lighting and compartmentalization might lead travelers to believe they've been placed in a refrigerator.

  • Sleepbox, Moscow

    Installed in a Moscow airport, the "Sleepbox" is a modular dorm room <a href="http://www.huffingtonpost.com/2011/08/15/the-sleepbox-makes-airpor_n_927010.html">designed to help travelers get a little shut eye</a> while waiting for the final boarding call.

  • CitizenM, Amsterdam

    The rooms at CitizenM, a hotel within Amsterdam's Schiphol International Airport, are slightly larger than the other rooms on the list, but notable because they pack a luxurious punch by <a href="http://www.citizenm.com/innovative-hotel-rooms">making use of every last inch of space</a>.

  • Snooze Cube, Dubai

    Like several other tiny hotels, Dubai Airport's Snooze Cubes are built around the needs of travelers. They also <a href="http://www.snoozecube.com/reservations/">look like porta-potties</a> from the outside and lack the charm of some of other tiny habitations. Probably better to sleep in the terminal.