Archaeological site Teatro di Pompeo in Rome

You're standing in the middle of what was once the largest theatre in the Roman world: the Theatre of Pompey. You can barely see it, but it's all around you. Notice how the streets and buildings curve here. They still follow the half circle of the old seating. Via di Grotta Pinta still roughly follows the line of the theatre, and the square of Campo de' Fiori lies right next to it.