What archaeology says
Archaeologists attribute the submergence to tectonic subsidence along the seismically active Lycian coast, most often linked to major earthquakes in the 2nd century AD. The eastern Mediterranean's plate boundaries can drop or raise blocks of coastline abruptly — the same tectonic regime that lifted western Crete by up to nine metres in AD 365 lowered other shores — and Kekova preserves the result with unusual clarity, its ancient sea-level features now a few metres below the modern waterline.
Dolchiste was a modest Lycian town, later part of the Roman world, that lived from fishing, trade and boat-building; after the earthquakes it was partly rebuilt but declined through the Byzantine era, exposed to Arab raids. Simena opposite, with its rock-cut tombs, small theatre carved into the hillside and later Crusader-era castle, survived as a village and remains one continuously inhabited today.
The Turkish state declared Kekova a Specially Protected Area in 1990, and diving and swimming are banned over the core ruins to prevent looting and anchor damage. Researchers value the site as a natural gauge of relative sea-level change on the Anatolian coast, where drowned quays and fish tanks record exactly where the Roman-era shoreline stood.
- Drowned quay walls, house foundations and staircases lie at depths consistent with a coastal drop of a few metres, matching known Lycian coast tectonics
- The visible architecture is typical Lycian-Roman small-town construction, with datable masonry styles and associated pottery
- Simena's rock-cut Lycian tombs, hillside theatre and inscriptions anchor the settlement firmly in the documented Lycian League world
- Regional studies of uplifted and submerged shorelines across the eastern Mediterranean corroborate abrupt 2nd-century and 4th-century seismic events
- The half-submerged Lycian sarcophagus at Kaleköy stands at a tilt in the shallows, directly recording relative sea-level rise since antiquity
- Protection as a Specially Protected Area since 1990 reflects formal archaeological assessment of the ruins' identity and value
