The Red Sea, also known as the Erythraean Sea lies between Egypt and Sudan in Africa and Saudi Arabia and Yemen in Asia. At the southern end lies the strait of Bab-el-Mandeb, considered by a few researchers as the location of the Pillars of Herakles.
Pliny the Elder refers to ‘Pillars’ at the end of the Red Sea and then, without pause, inexplicably mentions, Mauritania, Mt. Atlas and Cerne and shortly afterward to an island known as Atlantis!(c)
The ‘Red’ is often attributed to the seasonal blooming of a red-coloured bacterium. Some academics think that the cardinal points were ascribed colours, ‘red’ being south! Emilio Spedicato, in his paper(a) on the location of the biblical Ophir, points out that pumice which is normal volcanic ejecta turns blood-red when mixed with seawater. Immediately to the south is the East Africa Rift, home to dozens of volcanoes, which when erupting may have had pumice dust blown towards the Red Sea!
Coincidentally, the presumed cradle of humanity is situated not too far from the Rift volcanoes and has drawn serious claims(b) that they may have had a part to play in the evolution of hominids!
>The oldest known map of the Red Sea, referred to as the Nuzi Map has had its origins traced back to 120 years before the Flood of Noah(d)! George & Dana Brown, a father and son team from Florida, refer to the Red Sea as the Edenic Valley, to the east of which, in northwest Saudi Arabia, Cain’s city of Chanoch had lain(e) and also where, according to the Browns, Noah’s Ark landed(f)!<
(c) Pliny the Elder, The Natural History, BOOK VI. AN ACCOUNT OF COUNTRIES, NATIONS, SEAS, TOWNS, HAVENS, MOUNTAINS, RIVERS, DISTANCES, AND PEOPLES WHO NOW EXIST, OR FORMERLY EXISTED., CHAP. 36. (31.)—ISLANDS OF THE ÆTHIOPIAN SEA. (archive.org)