Based in the picturesque Dutch city of Valkenburg, home to an eleventh century castle, as well as the breathtaking Velvet Cave and the Gemeentegrot caverns that date back to the Romans. Look forward to a day in Germany’s spa city of Aachen, the place where kings and queens were crowned for over six hundred years. We also spend a day in Cologne and visit Brussels. Our base is the Hotel Walram, located in a riverbank square close to the centre of Valkenburg.