Archaeological site Arco di Augusto in Rome

You're standing in the Roman Forum, on the Via Sacra, right between the Temple of Castor and Pollux and the Temple of Caesar. Look down at the ground. Those low travertine remains are all that's left of the Arch of Augustus. Still, they tell you how big it was: almost eighteen metres wide and more than five metres deep. The arch closed off the eastern end of the Forum, close to the Temple of Vesta.