Hotel most overwater bungalows resorts. In 2006, "Guinness World Records" listed the First World Hotel in Genting Highlands, Malaysia, as the world's largest hotel with a total of 6,118 rooms (and which has now expanded to 7,351 rooms). The Izmailovo Hotel in Moscow has the most beds, with 7,500, followed by The Venetian and The Palazzo complex in Las Vegas (7,117 rooms) and MGM Grand Las Vegas complex (6,852 rooms). According to the Guinness Book of World Records, the oldest hotel in operation is the Nisiyama Onsen Keiunkan in Yamanashi, Japan. The hotel, first opened in AD 707 has been operated
Onsen hiragana character ゆ ("yu"), understandable to younger children, is used. Traditionally, onsens were located outdoors, although a large number of inns have now built indoor bathing facilities as well. Nowadays, as most households have their own bath, the number of traditional public baths has decreased, but the number of sightseeing hot spring towns has increased (most notable ones including Kinosaki Onsen, , and ). Onsens by definition use naturally hot water from geothermally heated springs. Onsens are different from sentō, indoor public bath houses where the baths are filled with heated tap water. Traditionally, men and women bathed together at