Towering over green fields, this 2nd-century villa is one of Rome's unsung splendours. It was the luxurious abode of two consuls, the Quintili brothers, but its splendour was in fact their downfall. The emperor Commodus had them both killed, taking over the villa for himself. The emperor added to the complex and the ruins are fabulously impressive. The highlight is the well-preserved baths complex with a pool, caldarium (hot bath) and frigidarium (cold cold). There's also an interesting small museum.
Buy tickets online in advance (€2 reservation fee).