The Colosseum in Rome is to get a new retractable floor so that visitors can experience what it was like for gladiators to stand in the middle of the iconic arena almost 2,000 years ago.

Keep in mind that most Colosseum tours only give you access to the arena floor and upper level. If you want to visit the hypogeum (Colosseum underground), you need to make sure it's included in ...

Similarly, you can buy tickets to the “Underground” (or “Dungeon”) portion of the Colosseum, which is below the arena floor.