seagaia ocean dome

one of the world's largest polynesia-themed indoor waterpark, located in miyazaki japan. The Ocean Dome, which was a part of the Sheraton seagaia resort, measured 300 metres in length and 100 metres in width, and was listed on the guinness world record .

unfortunately, The Ocean Dome was officially closed on October 1, 2007 as part of a renovation and partial re-branding of the resort.