🇬🇷 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.