Book excerpt: Nan Madol is probably the most mysterious ancient city in the world. Despite being more than 1.5 km long, the ruins of this city are located on a small island in the middle of the Pacific Ocean. Where is the rest of the country? Inexplicably, some of its walls begin at the bottom of the sea. How is that possible? Thousands of kilometres away, in the northern Sahara, a Japanese satellite identified the remains of a gigantic river, now dried up, which cut through a whole chunk of Morocco, turning it into a quasi-island. That island is exactly where Plato said Atlantis was. What is the connection between Nan Madol, "the island" in the Sahara near the Strait of Gibraltar, and Atlantis? In this book we give you the answer.