Arena

This is the Colosseum.  World famous, of course, for being the location where Bruce Lee defeated Chuck Norris in The Way of the Dragon.
Construction was begun under Vespasian in 72 C.E. and completed in 80 C.E. under his heir, Titus.  It is the largest amphitheater ever built.
Bruce Lee films have famously unstable titles.  The Way of the Dragon was released under the title Return of the Dragon to capitalize on the success of Enter the Dragon even though, technically, it was shot first. It has been claimed that the amphitheater could hold 87,000 spectators although modern estimates put that number closer to 50,000.
The Way of the Dragon was the only film Bruce Lee directed himself.  The “hypogeum” was an elaborate structure beneath the arena floor, which was actually wood covered in sand.
In fact, the word “arena” comes from the Latin word “harena” or “arena” which means “sand”.  The hypogeum contained passageways, cages for wild animals, and machinery for ramps & trap doors which could lead up to the arena floor.
In fact, my favorite moment in Ridley Scott’s Gladiator is when tigers are released through trap doors on an unsuspecting Maximus while is in the middle of a gladiatorial fight.  Historically, gladiators types were paired carefully to make the match as even as possible.  For example, a retiarius — armed with a net & trident — would usually be pitted against a secutor who was equipped with a smooth helmet the net wouldn’t catch on.Oh, shit.  Just realized why Bruce Lee set his boss fight with Chuck Norris here:  they were modern gladiators.  I can be so dumb sometimes.