There are many things to see in Rome and one of them is:
Colosseum construction started in 70 AD and was finished in 80 AD, the original name was the Flavian Amphitheatre. It was later renamed Colosseum after a Colossal statue of Nero that stood outside the Amphitheatre. The statue which was altered through the years to depict gods and other emperors was eventually removed during the middle ages and the only remainder is the base on which it once stood right outside the Colosseum.
The Colosseum was used for Gladiator games but it was also for a short period used for mock sea battles during which the arena was filled with water.