Iran

s. 1, ép. 3: To delve deeper into the history of the Silk Road, Sam Willis ventures into Iran, following an ancient caravan route through Persia's deserts, where he visits a temple where a holy fire has burned for 1,500 years. Finally, arriving in Venice, he learns how the ideas and products that trickled down the Silk Road helped to trigger the Renaissance and Europe on a path of unstoppable change.