🇮🇹 Italy · Submerged site
Motya – Punic Causeway Harbour, Isola di Mozia
Phoenician to Classical (c. 800–397 BCE) · Phoenician / Carthaginian
Phoenician lagoon island with 1 km submerged causeway at –0.5 m and cothon harbour, Stagnone.
🇹🇳 Tunisia · Submerged site
Thabraca (Tabarka) – Numidian–Roman Double Harbour
Numidian to Genoese (c. 400 BCE – 1542 CE) · Numidian / Carthaginian / Roman / Genoese
Numidian marble-shipping double harbour – causeway at –0.5 m and Roman quay at –1 m off Tabarka island.
🇷🇺 Russia · Submerged site
Porthmion — Chushka Spit Harbour at Chushka North (Kerch Strait Chushka)
Classical to Late Antique (5th c. BCE – 370 CE) · Bosporan Greek
Chushka Spit ferry harbour of Porthmion at Kerch Strait — 100 m rubble causeway at –2 m with wheel ruts and customs quay 60 m.
🇷🇺 Russia · Submerged site
Porthmion — Chushka Spit Harbour at Chushka North (Kerch Strait Chushka) — v2
Classical to Late Antique (5th c. BCE – 370 CE) · Bosporan Greek
Chushka Spit ferry harbour of Porthmion at Kerch Strait — 100 m rubble causeway at –2 m with wheel ruts and customs quay 60 m.
🇧🇴 Bolivia · Submerged site
Lake Titicaca — Pilko Kaina Bay Submerged Temple Reef
Tiahuanaco to Inca (c.600 – 1532 CE) · Tiahuanaco / Inca (Pilko Kaina Inca palace hypothesis)
Titicaca highest submerged temple — 10×8 m offering reef and 120 m causeway 2–8 m under lake at 3810 m off Pilko Kaina, Tiahuanaco-Inca votive gold/mullu.