Gela occupies a wide south-Sicilian gulf. The ancient city followed a long ridge parallel to the sea from Molino a Vento toward Capo Soprano, while river plains, the Biviere and dune systems connected agriculture, inland routes and maritime exchange.
Rhodian and Cretan settlers founded Gela in 689–688 BC. The colony founded Akragas, expanded inland and later passed through Carthaginian destruction, Timoleontean resettlement and the forced transfer of inhabitants to Phintias near modern Licata.
Frederick II founded Heraclea on the ridge in 1233; Terranova remained the name until Gela was restored in 1927. A visit now connects the living centre with separate archaeological areas, the Museum of Greek Wrecks, limited-access sites, the Biviere and an industrial zone whose environmental procedures remain active.