Belgrade, the capital city of Serbia, is a busy hub of the country's business, cultural, gourmet and nightlife scene. Its vantage point at the confluence of the Sava and Danube rivers presents travelers with a montage of old and new, traditional and contemporary, meditative and vibrant. Explore everything from the seats of power in Parliament, to the trendy Knez Mihajlova Street, venture up to Kalemegdan Park and fortress, then cross Sava River by a fisherman boat for a tasty lunch. Walk it all off in Belgrade's colorful old area, Zemun.