The Ocean Dome Club Alliance Hotels, a group of Miyazaki City hotels, cooperates to provide quality accommodation for Ocean Dome guests. The Ocean Dome is listed in the Guinness Book of World Records as the world’s largest indoor water park, measuring 300 meters in length, 100 meters in width. And the temperature is 30 degrees Celsius year-round.  There are quite a few differences between the Ocean Dome and the ocean, among them the heated indoor pool, the kids’ pool, the floating pool, and the three fast and thrilling water slides. Everyone feels like a child when playing in the water.