🇮🇹 Italy · Submerged site
Populonia – Etruscan Iron Harbour at Baratti
Etruscan Archaic to Roman (c. 700 BCE – 300 CE) · Etruscan / Roman
Etruscan iron-smelting harbour drowned under Baratti slag beach – quay blocks at –1 to –2 m.
🇮🇹 Italy · Submerged site
Caulonia – Achaean Harbour at Monasterace
Archaic to Hellenistic (c. 700–200 BCE) · Achaean Greek / Bruttian
Achaean colony harbour drowned at Punta Stilo – mole blocks at –1.5 m off Monasterace Marina.
🇮🇹 Italy · Submerged site
Baiae (Baiae Archaeological Park)
Republican to Late Antique (140 BCE – 8th c CE) · Roman
Former luxury resort of Rome’s elite (Caesar, Nero, Hadrian) with imperial villa, submerged by bradyseism (volcanic uplift/subsidence) to 5–9 m, with mosaics, statues and pilings visible snorkelling.