The turtles at the Games in the Tri-Sports Arena.
The Tri-Sports Arena is a gladiator-styled fighting arena where the Games are hosted by the Triceratons in the 2003-2009 series. The turtles are forced by the Triceratons to fight there in the episode Turtles in Space, Part 3: The Big House and Turtles in Space, Part 4: The Arena'.[1]