Mosbrucher Weiher

According to pollen analysis studies, the crater was formed about 11,000 years ago by a volcanic eruption.

In the area around the maar there are very few volcanic tuffs in comparison to other Eifel maars; only in two places are there greater accumulations of tuff; the rest of the surrounding area is covered only by a thin layer.

Because of its low water level it silted up relatively quickly and, after a few thousand years, became bog.

In 1838, water was drained from the pond so that the western outlying areas could be used as arable land.

Today, it forms meadowland and pastureland, while the eastern part retains its bog character.