Mayen´s pit field is oner of the oldest and most important mines of basalt lava. This porous stone is perfectly suitable for grain grindings am millstones.
A tour leads through the mine landscape, in the depth of the petrified lava river of the Bellerberg volvano with ist bizzare pillars.
Roman mining traces can be found near a modern crane from the 20 th century.
The sculpture park "LAPIDEA" is also on this area which is used for all kinds of events an by arches as training camp.