In a world of chain hotels and boutiques so ubiquitous they no longer merit the term, a hotel floating on the water is still a rarity.
A few intrepid hoteliers have set out for the seas, refitting old yachts, retooling old barges and making the most of their host cities' waterfronts. But some boat hotels go beyond just a cruise ship that never sets sail.
In New York City, an art installation in Jamaica Bay could be the coolest hotel in town, floating or otherwise. And in Sweden, a little cabin on the lake gives way to an underwater chamber that gives guests the feeling of sleeping in a fishbowl.