Erosion means wear on the cross-border biosphere reserve, caused by the weather and climatic conditions (water, wind, ice, etc.). It has caused interesting shapes to appear in the rock and on the mountainsides: these are called geological features.

These particular shapes are natural monuments, which give the landscape an attraction and ambiance which cannot be found anywhere.

Water is ever-present in the cross-border biosphere reserve, especially in the sandstone rock, spouting and gushing in many places. Rivers and streams are then formed, flowing into larger rivers. These sources have been used in many villages in the cross-border biosphere reserve to build fountains.

Sandstone arch © Yvon Meyer

Sandstone arch Erbsenfels © SYCOPARC