The Necropoli della Banditaccia is the main attraction and one of the best-preserved Etruscan necropolis sites in existence. Streets of tomb-houses carved from tufa rock, some with multiple rooms and carved furniture, give a vivid sense of how the Etruscans imagined the afterlife as a continuation of daily life. The site covers roughly three kilometres; wear good shoes and bring a torch.
The National Archaeological Museum in the town centre holds the finds that were not taken to Rome after 19th-century excavations — a useful introduction to what the necropolis once contained. The Castello Ruspoli and medieval town centre are worth a brief walk before heading out to the site.