Wallender Born, Cold water geyser in Wallenborn, Germany.
Wallender Born is a cold water fountain in the village that is fed by underground chambers filled with pressurized carbon dioxide. The water emerges from an artificial opening beneath a small pond and shoots upward at regular intervals.
Workers discovered this natural spring in the 1930s during industrial drilling operations when they struck an underground chamber filled with carbon dioxide. This accidental discovery eventually led to the site being made accessible to visitors.
Locals affectionately call this place 'Brubbel,' a name that echoes the bubbling and gurgling sounds of the water. The community has embraced this name as part of their identity and incorporated it into the walking trails and information signs.
The site is accessible via a loop trail about 3.5 kilometers long with various information points about the village and geology along the way. The path is well marked and suitable for visitors of all ages and fitness levels.
Below the surface, the phenomenon works through a complex interplay: carbon dioxide is pushed up from deeper layers, mixes with water, and creates regular eruption cycles. The spring also contains traces of hydrogen sulfide, which occasionally produces a distinctive odor.
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