Outside the fortification are the Necropolises of the Main Gate, Badia, Ulimeto and Ripaie, which have been under excavation since the 18th century.

The sites at Marmini, S. Giusto and Ulimeto offer some examples of tombs belonging to the Hellenistic period (end 4th-1st cent. B.C.). Their finds, among which are the famous cinerary urns made of tuff and alabaster, are part of the extraordinary Etruscan artistic collection in the Guarnacci Museum, one of the most ancient public museums in Europe.