Second only to Berlin in size and population, the city of Hamburg is home to one of the biggest harbors in Europe. A stroll along its many waterways and canals illustrates why it has been called the "Venice of the North." Don't miss a trip to the local fish market (Fischmarkt), the Merchants District (marked by its imposing red-brick architecture), a fine dining experience along the river or a night out in the university quarter. And did we mention the Reeperbahn (red light district)? It's quite famous for its… red lights.