🇪🇬 Egypt · Submerged site
Ayn Sukhna — Pharaonic Red Sea Harbour (Wadi al-Jarf / Ayn Sukhna Bay)
Old Kingdom to Middle Kingdom (c.2650 – 1700 BCE) · Old Kingdom Egyptian (Snefru–Khufu–Khafra)
Old Kingdom world's oldest harbour 2650 BCE — paired Ayn Sukhna jetty 0.2–1 m submerged and Wadi al-Jarf galleries with Khufu boat caches.