The Kato Paphos Archaeological Park covers the seafront ruins of Nea Paphos, the city's ancient Hellenistic and Roman heart. Spread across a flat coastal plateau next to the harbour, it bundles together the great Roman villas (Dionysus, Theseus, Aion, Orpheus), an odeon, the agora, the Saranta Kolones castle and the lighthouse — most reachable along signposted gravel paths.
Allow at least half a day. There is little shade and even less drinking water on site, so come early and bring a hat. The combined ticket also covers the Tombs of the Kings up the coast.