Big-O is more than just a Ferris wheel; it is a true engineering masterpiece located in the heart of Tokyo. This unique structure in Japan became the world's first centerless Ferris wheel, a feat officially recognized by the Guinness World Records. Its futuristic design with an entirely hollow center immediately catches the eye of visitors at the Tokyo Dome City entertainment complex.

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The total height of the structure reaches 80 meters, with the ring itself measuring 60 meters in diameter. The main visual highlight of the attraction is the Thunder Dolphin roller coaster train that screams through its hollow center at incredible speeds. This architectural choice creates an amazing dynamic contrast between the slow rotation of the wheel and the rapid movement of the train flying past passengers.
For visitor comfort, there are 40 enclosed gondolas, each accommodating up to four people. One of the most popular "features" of Big-O is the built-in JOYSOUND karaoke systems, allowing you to perform your favorite hits while admiring the city skyline. A full rotation takes about 15 minutes, during which breathtaking views of the Bunkyo district and the famous Tokyo Dome stadium unfold before you.