Ancient Aliens

Season 2 Episode 3

Underwater Worlds

Aired Unknown Nov 11, 2010 on The History Channel
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Episode Summary

Some have postulated that the underwater cities that dot the planet's ocean floors are awash in signs that aliens once visited. The famed Atlantis legends carry one that refers to extraterrestrial beings. However, a more shocking connection came when an ancient legend about an underwater UFO base in Lake Titicaca in Peru lead to the discovery of a city under the lake. Other underwater ruins may hold more secrets.


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