Mercury, Baden-Baden's local mountain, is an extinct volcano. There is still volcanic activity in the deeper layers of soil. The thermal water is forced upwards through various layers of soil by artesian pressure. At the foot of the Florentinerberg there are twelve different individual springs containing sodium chloride, through which the thermal water reaches the surface from a depth of 2,000 meters at a temperature of up to 68.8°C.
The springs pour out around 800,000 liters a day - that's nine liters a second. The twelve springs were combined into three tunnels at the end of the 19th century: Friedrichsstollen, Kirchenstollen and Neuer Stollen. The Friedrichsstollen is the main gallery - it pumps around 50 percent of the total volume of water that feeds the thermal water basins of the Caracalla Spa and the Friedrichsbad.
Thermal water as rich in minerals as that found in Baden-Baden is rare. Baden-Baden's thermal water is also known as fluoride-containing sodium chloride thermal water. These two predominant components give the water its mildly salty taste.
Experience for yourself the unique effect of balanced mineralization on your body. The whole organism is gently activated and you experience an incomparable feeling of relaxation. If you come to bathe after sport, the warmth and composition of the thermal water will have a positive effect on the regeneration of your musculoskeletal system. The metabolism is stimulated, which reduces or even eliminates sore muscles. Immerse yourself in Baden-Baden's liquid gold and enjoy the beneficial effects on body, mind and soul!