Walking through the streets of the historic centre, you cannot fail to notice the piazza that lies in the shadow of the castle and the bulky eleventh-century Belforti tower. The latter has a square base, thick walls in black-and-white stripes, and no crenellations or any of similar flim-flam. The tower originally belonged at various points to the Volterran families of Belforti, Pannocchieschi and Inghirami; it then served as the headquarters of the Volterran and Florentine governors, before passing to the French barons de Rochefort. Two horizontal apertures functioned as peep-holes over the castle of Volterra and the Sillana fortress.
The Romanesque church of San Biagio also faces onto Piazza Garibaldi, as does the fourteenth-century Palazzo Pretorio, which today functions as an archive and an integral part of a circuit that includes the mining site of Camporciano and the Mining Museum. The old copper mines are located around a kilometre from the town, and inside them you can see numerous tunnels an the famous Alfredo Shaft, and learn about all the stages in the ancient process of copper-working.