Alexandria underwater city. Lost for 1,600 years, the royal quarters of Cleopatra were discovered off the shores of Alexandria. A team of marine archaeologists, led by Frenchman, Franck Goddio, began excavating the ancient city in 1998. Historians believe the site was submerged by earthquakes and tidal waves, yet, astonishingly, several artifacts remained largely intact.
For almost three-quarters of a century its location at the bottom of the ocean was a maritime mystery. Even when explorers found the wreck of the Titanic in they struggled to understand exactly what happened on that terrible night she sank.