Wikipedia
The town of Limantepe, sometimes spelled Liman Tepe, on Turkey's western coast is the site a prehistoric ( Bronze Age) settlement that includes an ancient port dating from 2500 years located underwater offshore. The area is situated in the urban zone of the coastal town of Urla near İzmir.
The harbor settlement was inhabited starting from 6000 years ago and was equipped with a fortification wall partially submerged in the sea. The settlement changed significantly over time, and is one of the oldest known artificial harbors in the Aegean Sea. The underwater find includes vessels and urns that are believed to have arrived at the port from Greece and maybe Cyprus via the Black Sea.
The archaeological site was discovered by Ekrem Akurgal in 1950, and its exploration has been pursued on land and underwater since 1979 by an international team and many of the artifacts discovered are currently on display in İzmir Archaeology Museum. It is very close but separate from the site of Klazomenai, inhabited as of the Iron Age and which itself had changed location several times during its history in the same area between the mainland and Karantina Island across its coastline. Israeli archaeologists and divers including students from Haifa University have helped investigate.