Corinth was one of the few Greek cities that had two ports, Lechaion in the Corinthian Gulf and Kenchrees in the Saronic Gulf. The ports were named after the sons, Lechis and Kechrias, of Poseidon and Pirene, daughter of the river God Acheloos.
Kechrees was the eastern port of Corinth, the first with a natural bay, on the south of Isthmia. Today, at the site ruins of the facing jetties are preserved, both on land and underwater. The edges of the jetties were just 20 meters apart from each other. Underwater, at the edges of the harbor breakwaters, small temple-form buildings are visible, possibly dedicated to Poseidon and Isis.
Kechrees was the eastern port of Corinth, located 70 stadiums away from the city and its peak growth was during the hundred-year period when Corinth was a Roman Colonia. It had always been the commercial port of Corinth, that was crated from a natural bay and the first technical work is believed to date back to the archaic period. Today, the port consists of traces from adjustments and additional construction works that were conducted in the Roman times. It was horseshoe-shaped with two technical breakwaters that extended far into the sea, creating a 200m opening. The alcove of the port was surrounded with tunnels and harbor facilities. At the southern breakwaters there were storerooms, nymphaeum, a temple for Isis and the early Christian Basilica of the 4th century A.D. At the northern breakwaters there was a square tower, Aphrodite’s sanctuary and various other buildings. In 53 A.D. St. Paul the Apostle disembarked on the port of Kechrees during his first trip to the city of Corinth.