Keep in mind that most Colosseum tours only give you access to the arena floor and upper level. If you want to visit the ...

Similarly, you can buy tickets to the “Underground” (or “Dungeon”) portion of the Colosseum, which is below the arena floor. Some tours package both the Floor and Underground together and ...

It doesn't include a visit to the Colosseum's underground tunnels. For that, you'll have to book a guided tour. – Laura Itzkowitz The site of many bloody gladiatorial fights, the Colosseum ...