Quenast quarry
Quenast, Belgium
The Quenast quarry (Carrière de Quenast) or Porphyry quarries of Quenast is a historic porphyry deposit in Belgium and Europe's largest open-pit quarry. Porphyry has been mined from the quarry as an important source for construction since the 17th century and was traditionally used to make Belgian cobblestones for city streets.
Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).