The tri-border region (Drielandenpunt) is where Belgium, Germany and the Netherlands meet. It is also the highest point in the Netherlands (323 meters). An observation tower at the top gives an unobstructed view of the 3 countries.
In the east of Valkenburg aan de Geul, in the district of "Oud Valkenburg", lies the "Kasteel Schaloen", surrounded by a moat and built of marlstone, which was first mentioned …