Discover Pavlopetri (Greece), an ancient city submerged by earthquakes, and find evidence of its great textile industry and trade. Continue with Apollonia (Libya), with its structures and port remarkably preserved underwater. Then, visit Baiae, a sunken Roman resort town with richly decorated villas, and end with Egypt's Thonis-Heracleion and Antirhodos, revealing temples, palaces, and statuary.