SegaWorld London was an indoor theme park located inside the London Trocadero in London, England. The venue opened up in September 1996 and operated as a joint-venture between Chorion, the owners of the Trocadero, and Sega. At 110,000 square feet, it was claimed to be the largest indoor theme park in the world. It was Sega's flagship venue in Europe and the first Sega theme park outside of Japan.