The Seagaia Ocean Dome was the world's biggest indoor waterpark, featuring 300 meters in length of sheer, awesome beach, and 100 meters wide. It has it's own entry listed in the Guinness World Records for being the biggest indoor waterpark.
It opened in 1993, but it's peak amount of visitors happened in 1995, averaging 1.25 million visits a year. The Ocean Dome was closed on October 1st, 2007 (although I don't know why).
The sand was warm and artificial, and the volcano gave the beach a powerful atmosphere. Every hour, the volcano erupts, and the wave machines start up, which would give visitors a chance some sanitized surfing! The dome's roof was retractable, so that natural sunlight could also shed some rays to the visitors below, but whether it rained or not, the closed roof provided light and permant blue sky, with pillowy clouds. The air temperature in the Ocean Dome was held constantly at 30 celcius, and the water at around 28 celcius.
The admission price was Â¥2600 per adult and Â¥1600 for children, about $25 to $30 USD, depending on the season. - If you're a fan of all things Japanese, check out this Japanese Cat Cafe!