Bike Touring Highlight
The basalt sphere, formed by volcanic activity, measures 5 meters in diameter and weighs 120 tons. It detached itself from the quarry wall at a height of 15m in 1969 when it was detonated in the quarry on Wartgesberg. In the winter of 1980/81, citizens of Strohn pulled them on an iron plate with a bulldozer over the frozen blanket of snow to their current location. It did not arise from a single ejection, but from being thrown up and back into the crater several times, absorbing lava and slag pieces until it got stuck in the crater rim and finally cooled off.
September 19, 2021
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