Ulmen
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Ulmen is a City in Rhenania-Palatina. It is famous for it's maar and a Tunnel (Ulmener Stollen). The tunnel connects the maar Jungfernweiher and the Ulmener Maar. It's a way in a cave throughout a volcano. The length is 120 meters. The width of the passage is at it's most narrow place only 70 centimeters.Claudia LBVisisted on 28 Jul 2023
Location of Ulmen
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- Das sieht nach einer spannenden Höhle aus!
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