Near the Calla Cascades, you will find the large, mystic “Geysirhöhle” sauna. Its walls are covered in real quartzite. The ceiling of Petras Salgadas slate is supported by thick silver fir stems. This massive ambience invites you to experience a variety of visual and physical stimuli like wafts of steam, changing colourful light effects, and soothing music. A special highlight is the active geyser, which keeps the relative humidity at a pleasant level with its two meter high fountain. A visit to the "Geysirhöhle" is sure to be an unforgettable experience.