Known locally as the Brubbel, the Wallender Born is one of the few cold-water geysers in Europe. Every 30–35 minutes, the earth seems to come alive as a fountain of water bursts upward, reaching heights of up to four meters. Unlike hot-water geysers powered by volcanic heat, the Brubbel’s eruptions are caused by carbon dioxide gas rising through underground springs, a rare natural spectacle.
Information boards around the site explain the unusual geology behind the eruptions, as well as the cultural history of the Brubbel. There is a car park nearby, but the site can also be walked or cycled to.