Join Marcel Krüger on a ramble through the historical centre of one of Germany's oldest cities. This walk takes you past the impressive Gothic cathedral, Germany's most-visited tourist attraction, to the remnants of Roman Cologne, and the restored medieval old town of the city. It provides insight into the diverse and sometimes troubled history of Cologne and its relationship with the river Rhine. You will hear about the relics of the Three Kings, greedy merchants, Roman harbours and heads on spikes. And you might even learn something about local beer culture along the way.The tour is ready whenever you are and the audio plays automatically at exactly the right time and place using your smartphone's GPS and the VoiceMap mobile app, which also works offline.