Secret Cities (do-over, ep 170)

<p>Quick, switch over to <a href="https://vodacast.com/" target= "_blank" rel="noopener">Vodacast</a> to see the pictures I talk about in the episode!</p> <p>We all lose things -- keys, wallets, patience -- but how do you lose an entire city?  Hear the stories of three American towns built in a hurry but kept off the map, secure Soviet enclaves known by their post codes, ancient cities found by modern technology, and the ingenious engineering of underground dwellings.</p> <p><a href="http://www.yourbrainonfacts.com/book" target="_blank" rel="noopener">YBOF Book</a>; <a href= "https://www.chirpbooks.com/audiobooks/your-brain-on-facts-by-moxie-labouche"> Audiobook</a> (basically everywhere but Audible); <a href= "https://www.teepublic.com/stores/your-brain-on-facts?ref_id=11890"> Merch</a></p> <p>Reach out and touch Moxie on <a href= "http://yourbrainonfacts.libsyn.com/content/facebook.com/yourbrainonfacts">Facebook</a>, <a href="http://yourbrainonfacts.libsyn.com/content/twitter.com/moxielabouche">Twitter</a>,  or <a href= "http://yourbrainonfacts.libsyn.com/content/instagram.com/yourbrainonfacts">Instagram.</a></p> <p><a href="http://www.yourbrainonfacts.com/social" target="_blank" rel="noopener">Hang out</a> with your fellow Brainiacs.</p> <p><a href="http://www.patreon.com/yourbrainonfacts">Support the show</a></p> <p>Music by <a href="http://www.incompetech.com/">Kevin MacLeod,</a> .  </p> <p>Links to all the research resources are on our <a href= "http://www.yourbrainonfacts.com/">website</a>.</p> <p> </p> <p><span style="font-weight: 400;"> I</span><span style= "font-weight: 400;">n the opal-mining region of South Australia, lies the town of Coober Peedy.  You’re welcome to visit, but don’t expect to see much.  There aren’t many buildings, though the landscape is dotted with ventilation shafts.  There’s almost no movement at all.  So if the town is here, where are its 3500 residents?  Look down.  My name’s Moxie and this is your brain on facts.</span></p> <p> </p> <p><span style="font-weight: 400;">In 1943,