Beyond the Arch of Domitian you come to the ruins of the Roman baths, then to the Appian Way of Hierapolis, an extraordinary necropolis (cemetery), extending several kilometres to the north, with many striking, even stupendous, tombs in all shapes and sizes. In particular, look out for a cluster of circular tombs, supposedly topped with phallic symbols in antiquity.
In ancient times Hierapolis was a place where the sick came for a miracle cure, but the size of the necropolis suggests the local healers had mixed success.