A left turn off Via Guarnacci as you head steeply down toward Porta Fiorentina takes you to Via Lungo le Mure, a walkway atop the medieval ramparts. Take a stroll to overlook the impressive remains of Volterra's Roman theater and baths, some of the best-preserved Roman remains in Tuscany. The theater dates back to the 1st century B.C., though parts of it were torn up for building materials during the construction of the medieval walls. The view from up here is the best way to see it all, and for free, but if you do want to wander among the stones, there's an entrance down on Viale Francesco Ferrucci.