Antaeus' Arena is an arena owned by Antaeus in Daedalus' labyrinth. The arena has skulls everywhere which Antaeus supposedly dedicated to his father, Poseidon, which were fashioned into an altar. Luke Castellan and his army needed Antaeus' permission to go through it to make it to Camp Half-Blood.
After Percy Jackson and Annabeth Chase recruit Rachel Elizabeth Dare, a clear-sighted mortal, to help guide them through the Labyrinth, they end up in Antaeus' Arena. It is revealed that the arena is a crossroad in the Labyrinth, similar to the Triple G Ranch, in which users of the Labyrinth must pass through in order to get to Daedalus' workshop. Percy defeats a Scythian Dracanae, Ethan Nakumura, and Antaeus in the arena. After stabbing at him with Riptide a couple of times, Percy realizes that in order to defeat Antaeus, he must get Antaeus off the earth, as he is a son of Gaea, and regenerates wherever he is hit when he touches the earth. Therefore, he has to trap Antaeus in the chains hanging above the arena to actually hurt him. After he defeats the giant, they flee the arena by creating a distraction by summoning Mrs. O'Leary.
- It is set up like the Roman Colosseum.
- Antaeus sits on a throne like an emperor.
- Antaeus has monsters and demigods fight to death for his amusement.
- It is like gladiatorial games in Rome.
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