There's an invisible layer to the city where you live. It's meant to make your life easier, but is easy to overlook. Roman Mars of the podcast "99% Invisible" helps us examine how our urban environments are designed. And author Paul Theroux tells us how he explores getting older and the surfing culture near his home on Oahu's North Shore in his latest novel, "Under the Wave at Waimea." 
For more information on Travel with Rick Steves - including episode descriptions, program archives and related details - visit www.ricksteves.com.

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