Utter Inn, Lake Malaren, Sweden Image courtesy of UHOTW.com Talk about an exclusive resort. The Utter Inn (utter is Swedish for otter), anchored in the middle of a lake, only has two single beds. It takes a 10-minute boat ride to arrive at your room, which measures 25 square meters, with one room above water and another underwater. It was started as a creative project by artist Mikael Genberg, but guests couldn't get enough of the picture-window views of the lake's full-time residents. From 1100 SKR ($165 USD) a night, unusualhotelsoftheworld.com Next Das Park Hotel, Ottensheim, Austria