🇱🇾 Libya · Submerged site
Antipyrgos Submerged Harbour
Hellenistic to Roman (4th c. BCE–5th c. CE) · Ptolemaic / Roman
Submerged mole of Antipyrgos in Tobruk Bay (2 m deep) with Hellenistic tower.
🇬🇷 Greece · Submerged site
Aigosthena – Fortified Harbour of Megaris, Porto Germeno
Classical to Medieval (370 BCE – 1500 CE) · Megarian / Boeotian / Hellenistic
Megarian border fort — 18 m SE tower with original roof above 60 m mole at −2 m guarding Kithairon pass.