At the height of its glory in the 1st century b.c., this amphitheater could seat up to 15,000 spectators. Chariot races were held here, along with gladiator combats and mock sea battles, for which the arena would be flooded. Many of the seats were placed dangerously close to the bloodshed. You can visit some of the rooms that housed the wild animals and gladiators waiting to go into battle.