The archaeological area known as the Valley of the Temples in Agrigento, Sicily, is one of the most important archeological sites in the world and a Unesco world heritage site since 1998. Along a long rocky scarp, chosen as the southern limit of the town, are still sited the great temples of ancient Akragas: the Temple of Hera (Juno) Lacinia, Concordia, Heracles (Hercules), Olympian Zeus (Jupiter), Castor and Pollux (Dioscuri) and Hephaistos (Vulcan). Further down, on the bank of the Akragas river, near a medical spring, stood the Temple dedicated to Asklepius (Eusculapius), the god of medicine. At the mouth of the river there was the harbour and emporion (trading-post) of the ancient city.