If you look at the map of Netherlands, you will notice a piece in the far southeast jutting out into Germany and Belgium. One of the most interesting towns here is the medieval Valkenburg or Valkenburg aan de Geul. The town is concentrically built around a ruined Valkenburg Castle, standing in a hill. The castle dates to the 14th century and was ruined in the Dutch-Spanish wars. The town draws quite large tourist crowds, even during COVID, with its dozens of outdoor restaurants, pretty medieval buildings and architecture and several bridges and canals.