Hikers on the "Wasserfallweg" (Waterfall Trail) usually rest at Dockweiler "Drees". Here, about 2 litres of healing and tasty mineral water from Lower Devonian rock layers flow from the spring.
The sodium-alkaline-hydrogen carbonate "Säuerling" (acidulous water) from the forest area along the Erft-Lieser-Mosel hiking trail leaves rust-red deposits on the brick surround of the Dockweiler "Drees". The water bubbles out of the walled spring at a temperature of approx. 8° C.
Take a rest at this idyllic spot by the "Alter Bach" (old brook). A hut in the immediate vicinity offers additional shelter.
Further information can be found in the brochure: "Dreese - Mineralwasser- und Kohlensäurequellen der Vulkaneifel".