Finally, hidden 6.5 kilometers off Alexandria’s coast under water was the city of Thonis-Heracleion. Aurélia Masson-Berghoff, curator of the Sunken Cities exhibition at the British Museum said, “As an archaeologist, discovering a tomb is exciting, but it’s the tomb of one individual.” She continued, “Discovering a whole city, which was home to thousands and thousands of people over more than a thousand years … Well, that’s something else.”