🇪🇬 Egypt · Submerged site
Quseir al-Qadim — Southern Roman Anchorage Extension
Ptolemaic to Islamic (280 BCE – 1400 CE) · Ptolemaic / Roman / Ayyubid
Quseir/Myos Hormos southern twin basin — Roman concrete mole and Ayyubid jetty 0.3–1.2 m submerged south of main harbour.