At the southernmost tip of Zuid-Limburg, nestled between the mossy green hills, lies the extraordinary city of Valkenburg aan de Geul. Located in the heart of the Heuvelland nature reserve, this marlstone city boasts a rich touristic tradition and a lush Tuscanesque landscape that has drawn visitors from home and abroad for more than 125 years. Valkenburg aan de Geul, just a stone’s throw from the major cities of Maastricht, Aachen, Liège, Hasselt and Tongeren, truly is the beating heart of the Euregion. Zuid-Limburg is an area where a yellowish bedrock called marlstone comes to the surface. Valkenburg and its surroundings are known for its 250 km network of underground passageways. The marlstone caves and quarries of the region provide an insight into its fossilized past. The caverns are also used to reconstruct the past; for example, there is a replica coalmine and a reconstruction of Roman catacombs in the caves. But lesser known activities are also organized underground, such as Christmas fairs, survival tours and cycling and MTB tours. Enjoy the special Christmas cheer in Valkenburg! In addition to the atmospheric lighting and decoration of the city, the caves offer an absolute highlight: two underground Christmas markets! Many hundreds of thousands of visitors have enjoyed the very special atmosphere at the underground Christmas markets in recent years. You will be impressed by the unusual surroundings and the beautiful decorations. The large range of Christmas gifts will especially impress lovers of the crafts trade.