Skip the Mona Lisa when you visit Paris. Don't tour the Coliseum in Rome. Walk, don’t hurry. Chris Arnade speaks with EconTalk's Russ Roberts about a different way to travel. Listen as Arnade shares what he learned from Istanbul's small community mosques and how Avignon's Congolese-neighborhood cathedrals provided moving moments of spirituality. He also explains why Japan and Vietnam's emphasis…