The Poseidome Colosseum  is the Colosseum of Atlantis.


It is a large concrete, Greek building, with large concrete cylinders at the main entrance. Inside there is a modern arena, with show lights, a ring, and many rows of viewing seats.


King Neptune and SpongeBob SquarePants had a cooking contest in this building in the episode "Neptune's Spatula."

It also appears in Battle for Bikini Bottom, where Robo-Sandy is the boss, and the player must defeat her. It is one of the arenas which appears in Nicktoons MLB.


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