1. Cleopatra's Alexandria serageldin.com The ancient ruins of Cleopatra VII's royal quarters lie in the murky waters of a harbor in Egypt's Alexandria. media.smithsonianmag.com / Via http://Stéphane%20Compoint Since 1992, marine archaeologists have been exploring Cleopatra's Alexandria. 2. Yonaguni Monument blogger.com Discovered in 1987, the Yonaguni Monument is a massive underwater rock structure in Japan. giantstridedives.com The debate still rages about whether the site is natural or man-made. 3. Pavlopetri wordpress.com Pavlopetri off the Southern Coast of Greece was discovered to have homes, tombs, roads, courtyards, and temples all arranged in a well-planned urban center. 4. Mahabalipuram gokerala.org The legend has it that near the famous Mahabalipuram temple in India, six more temples are submerged beneath the waves. upload.wikimedia.org In 2004 a tsunami revealed several stone structures buried in the sand and water close to the Mahabalipuram temple. 5. The Cambay Ruins columbia.edu In 2000 this site was found in the Gulf of Cambay (also known as the Gulf of Khambhat) in India by chance when oceanographers were doing sonar testing for pollution. 6. Port Royal jnht.com In the 17th century, Port Royal in Jamaica plunged beneath the water during an earthquake. 7. The Lost Villages louishelbig.com / Via louishelbig.com The Lost Villages are 10 communities in Ontario, Canada, which were permanently submerged by the creation of the Saint Lawrence Seaway in 1958.