8. Sunken City off Cuba
In May 2001, an exciting discovery was made by Advanced Digital Communications (ADC), a Canadian company that was mapping the ocean bottom of Cuba's territorial waters. Sonar readings revealed something unexpected and quite amazing 2,200 feet down: stones laid out in a geometric pattern that looked very much like the ruins of a city. "What we have here is a mystery," said Paul Weinzweig, of ADC. "Nature couldn't have built anything so symmetrical. This isn't natural, but we don't know what it is." A great sunken city? It must be Atlantis, was the immediate suggestion of many enthusiasts. National Geographic showed a great deal of interest in the site and was involved in subsequent investigations. In 2003, a minisub dove down to explore the structures. Paulina Zelitsky of ADC said they saw a structure that "looks like it could have been a large urban center. However, it would be totally irresponsible to say what it was before we have evidence." Further explorations are forthcoming.
More information:
Sunken City Off Cuba
9. Mu or Lemuria
Nearly as famous as Atlantis is the legendary lost world of Mu, sometimes call Lemuria. According to tradition among many Pacific islands, Mu was an Eden-like tropical paradise located somewhere in the Pacific that sunk, along with all of its beautiful inhabitants, thousands of years ago. Like Atlantis, there is ongoing debate as to whether it really existed and, if so, where. Madame Elena Petrovna Blavatsky, the founder of the Theosophy movement in the 1800s, believed it was in the Indian Ocean. The ancient residents of Mu have become a favorite of channelers who bring their enlightened messages to present times.
More information:
Lemuria
A Short History of Lemuria
10. Caribbean Underwater Pyramids
One of the most intriguing tales of the discovery of ruins of a lost civilization is the story of Dr. Ray Brown. In 1970, while diving near the Bari Islands in the Bahamas, Dr. Brown claimed to have come across a pyramid "shining like a mirror" that he estimated was 120 feet tall, although he could see only the top 90 feet. The pyramid had a colored capstone and was surrounded by the ruins of other buildings. Swimming into a chamber he found a crystal held by two metallic hands. Over the crystal hung a brass rod from the center of the ceiling, at the end of which was a red multifaceted gem of some kind. Brown said he took the crystal, which allegedly has strange, mystical powers.
Brown's story sounds fictitious - it's just too spectacular. But it excites the imagination and wonder about all the mysteries that could be down there - lost worlds awaiting rediscovery.

