Imagine stepping into a beach paradise where the weather is always perfect, the waves are always rolling, and the sky is eternally blue. This was the reality at the Seagaia Ocean Dome in Miyazaki, Japan, the world’s largest artificial beach. As part of the Sheraton Seagaia Resort, this magnificent indoor tropical haven offered visitors a chance to experience an idyllic seaside retreat regardless of the season.
A Beach Unlike Any Other
Opened in 1993, the Seagaia Ocean Dome was a marvel of engineering and creativity. Spanning an astonishing 300 meters in length and 100 meters in width, it was large enough to accommodate up to 10,000 guests at a time. The dome featured a retractable roof that could open on sunny days, but even when closed, the ceiling displayed a stunning artificial sky, complete with fluffy clouds and endless blue horizons. The climate inside was meticulously controlled, maintaining a balmy temperature of around 30°C (86°F), while the water remained a pleasant 28°C (82°F) year-round.
Crystal-Clear Waters and Perfect Waves
One of the most impressive features of the Ocean Dome was its wave pool, which generated artificial waves ideal for surfing. Designed to mimic the ocean, the pool was a popular attraction for both beginners and experienced surfers. A pristine stretch of white sand lined the pool, crafted from finely crushed marble, giving the illusion of a natural tropical beach. Unlike real beaches, there were no concerns about jellyfish, sharks, or sudden changes in weather—just an endless summer experience.
A Tropical Oasis Indoors
The Seagaia Ocean Dome didn’t stop at offering just a beach. It was designed to be a full-fledged tropical paradise, complete with waterfalls, palm trees, and a towering, 40-meter-high volcano that erupted in spectacular fire and smoke displays every hour. The facility also featured water slides, a children’s play area, and luxurious lounge spaces where guests could unwind in a resort-like atmosphere.
Why Did It Close?
Despite its popularity and unique attractions, the Seagaia Ocean Dome faced financial difficulties over the years. The high maintenance costs and declining visitor numbers led to its closure in 2007. While it was initially expected to undergo renovations, plans to reopen never materialized, and eventually, the structure was demolished in 2017.
A Legacy of Innovation
Though the Seagaia Ocean Dome is no longer standing, its legacy remains as a testament to human ingenuity and our ability to create breathtaking experiences. It was an extraordinary achievement in artificial environments, offering a glimpse into a future where weatherproof beach vacations might become commonplace. For those who had the chance to visit, the Ocean Dome remains a cherished memory—a place where summer never ended, and paradise was just a step inside.
