Slenaken - Hotel Klein Zwitserland. Klein Zwitserland is the name of the hilly region where river de Gulp flows from Belgium into The Netherlands. In the middle of this beautiful region rich in woodlands and meadows you will find Hotel and Restaurant Klein Zwitserland (Little Switzerland) Wellness & Spa. The hotel lies on a hilltop just outside the village of Slenaken. The views from the hotel over the surrounding Limburg landscape are breathtaking.