I took several dozen shots from the outside of the colosseum but I tend to think those are the most common. I wanted to disply one here of the inside from an elevated vantage point. I went as high up as allowed (without getting thrown out) and took this shot. You can see the wood boards that were laid down in the back to demonstrate the fighting floor level. Everything below that point were basically underground tunnels. I took many pictures inside but this was my favorite.