Summary: <p>The Jefferson Exchange: April 23, 2013, Hour 2:</p><p><b> <span class="headlinetext">Hidden Cities</span> </b><br><br> Many of us may be wary of wandering the streets of a strange city. Moses Gates appears to possess no such fear. He studied urban planning and began to explore hidden corners of New York City... and that led to similar adventures in cities on four continents, from New York subway tunnels to Paris catacombs. His exploits are detailed in the book <a href="http://www.us.penguingroup.com/nf/Book/BookDisplay/0,,9781585429349,00.html" target="_blank"><strong>"Hidden Cities: Travels to the Secret Corners of the World's Great Metropolises." </strong></a></p>
