The artillery fortress was constructed in the cliffs of Rigi as part of the Gotthard defence during and for World War II. For many decades it remained a well-kept secret and was always ready for battle.
Vitznau lies in an idyllic bay of Lake Lucerne at the foot of the Rigi. This holiday resort in central Switzerland is a popular starting point for numerous excursions around the lake, primarily and naturally, up the famous regional mountain.
Located on the southern slopes of the Rigi, “Queen of the Mountains”, high above sparkling Lake Lucerne, the Gruebisbalm cave offers an original setting for galas, dinners and shows.