Mountain Biking Highlight
Recommended by 9 mountain bikers
Location: Boncourt, District de Porrentruy, Espace Mittelland, Switzerland
Impressive grotto under Millandre
The active, vadose cave has been scientifically well studied. It is located in subhorizontal, fossil-bearing limestone. The cave river Milandrine flows through it, has a measured length of 10,520 meters and a vertical extension of 135 meters.
de.wikipedia.org/wiki/Grotte_de_Milandre
August 14, 2024
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