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Inside the hidden 'city' where 1,600 people go to work each daySubTropolis in Kansas City, Missouri, has millions of square ... level and has trademarked the claim to be the ‘World’s Largest Underground Business Complex’. SubTropolis, which has been ...
With over 8,000 cubic meters of water, it contains more 3.5 Olympic swimming pools of water volume, all geothermally heated.
Prior to this discovery, the largest underground thermal lake title belonged to a site in Hungary, below Turkish baths in the city of Budapest, Reuters reported in 2008. That lake is 282 feet long ...
Archaeologists discovered an ancient underground city beneath Abarkuh, Iran, where residents in Iran escaped above-ground heat. In the subterranean settlement, they found an aqueduct to transport ...
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