This ancient Roman necropolis, on the southwestern edge of town, is considered one of the most important of its kind in Andalucía. Hundreds of tombs, some elaborate and many-chambered, were hewn into the rock in the 1st and 2nd centuries AD. Most of the inhabitants were cremated: in the tombs are wall niches for the box-like stone urns. You can enter the huge Tumba de Servilia, the tomb of a family of Hispano-Roman VIPs, and climb down into several others.
The site also features an interesting museum displaying objects found in the tombs. Across the street is the 1st-century-BC Anfiteatro Romano.