Worldbuilding Wednesday - Ancient Tunnels

Over on smithsonianmag.com, "A Secret Tunnel Found in Mexico May Finally Solve the Mysteries of Teotihuacán."  Find out more here.

Also, on spiegel.de, discover "Rome's Tremendous Tunnel: The Ancient World's Longest Underground Aqueduct" here.

Finally, on ancient-origins.net, "Extensive Ancient Underground Networks [have been] Discovered Throughout Europe."  Learn more at here.

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