You must have traveled in the sleeper cabin of a plane or a rail coach many a time, but sleeper buses are something unusual that you would love to travel rather reside in during a long tour with your family or friends. Here is a bus by German tour company Rotel Tours that integrates a six-foot-long bed, which is about 3 feet wide by 3 feet high, for all the passengers. The sleeper bus also features a bathroom but sadly is without shower or bathing facilities. However, the bus makes “occasional stops” at RV parks and campgrounds for the “express purpose of bathing.” Intended exclusively toward German tourists, the hotel on wheels lets the occupants travel in utmost comfort.