There are many wonders of the world in the world and none less than the greatest works of architecture and engineering.
The Colosseum was constructed in 80 CE under the rule of Emperor Vespasian. It was a marvellous architecture wonder and the amphitheater had a capacity to house around 80,000 spectators.
It was used for gladiatorial contests and staged mock battles, animal hunts, executions and dramas based on classical mythology.
The underground portion of the Colosseum consists of numerous rooms and tunnels which housed gladiators and wild animals.