We visited Maastricht last weekend and had a tour of the caves. Our guide, Anton, was fantastic. He has a true passion for his subject and his knowledge of the caves, and of other caves in the area is impressive. One feels a connection with all those who worked in and visited the caves through the ages as you move through the dark passages and see chisel marks and graffiti. The earliest signature we saw was from 1554 - amazing! I get a bit claustrophobic so had to take a few deep breaths as I began to understand what a labyrinth it is and how easily one could get lost. But this is part of the experience! Many thanks!