where gladiators once trained before fighting in the Colosseum. The ancient arena is so close and massive that it's hard not to have an excellent view from practically anywhere you choose to sit.

Explore a plan of the Colosseum to investigate six key areas. Each shows an aspect of the sophisticated technology and planning that lie behind this incredible structure.

As the most enduring symbol of the Roman Empire and one of the most famous landmarks in the world, the Colosseum receives more than 6 million visitors per year – which means it's not easy to ...