Cologne is Germany's oldest city, and it has been an important financial center for centuries. Not surprisingly, its Old Town boasts some spectacular architectural and artistic gems. With Free Tours in Cologne you will discover, among many other landmarks, the magnificent Cologne Cathedral. This is the most important of the 12 historic churches that are still preserved in the city. More importantly, inside you can find the reliquary where the remains of the Biblical Three Wise Men are kept. Nearby are the interesting Colonia Central Station, the Town Hall and the Fish Market Square. Strolling along the peaceful Rhine River, you will find the best-known among the modern landmarks of Cologne, the wonderful Hohenzollern Bridge. Additionally, Cologne's National Socialism Documentation Center is a must-visit landmark. Here it’s possible to learn about Nazism in Cologne and the Allied bombing that almost destroyed the city during World War II.