7. Mostar, Bosnia-Herzegovina: Part of the thrill of traveling in Europe is sorting out its complicated cultural mix. And nowhere is Europe's ethnic make-up more complex than in Bosnia. Once the heart of the former Yugoslavia, Bosnia is a world where East meets West, where minarets and church spires compete for your attention, and where the cultural tectonic plates of Islam and Christendom rub together. We'll visit a Bosnian city that was in our headlines two decades ago as its landmark old Turkish-style bridge was blasted to bits. It's a fascinating place to learn about the last generation's war...and about how a new generation is knitting the city back together.