How to reach
Take the boat from Lucerne to Vitznau. Change to the cogwheel train to Rigi Kulm.Above Vitznau at 900 m above sea level on the car-free Rigi south side .Gruebisbalm is accessed by the Vitznau-Rigi-Bahn. The journey time from Vitznau is 6 minutes .At the station Grubisbalm a comfortable path (lit with a string of lights) leads through the idyllic forest and meadow landscape of the Rigi to the cave.
The walk takes about 10 minutes (400 meters) and you stand in front of the entrance of the cave,it is adorned by a waterfall and in the cave there is a small.