🇬🇷 Greece · Submerged site
Gytheio – Submerged Roman Harbour of Laconia
Classical to Late Antique (500 BCE – 600 CE) · Spartan / Roman
Sparta's naval harbour — Roman quays and 70 m concrete mole now at −4 m off Gytheio and Marathonisi, mapped by Flemming 1968–71.