Atta Cave

The Atta Cave (German: Atta-Höhle) or Attendorn Dripstone Cave (Attendorner Tropfsteinhöhle) in Attendorn is one of the largest dripstone caves in Germany. The cave was discovered during the quarrying of limestone at the Bigge Valley Limestone Works (Biggetaler Kalkwerk) on 19 July 1907 and was opened up by the owners to tourists that same year. Today the Atta Cave is the most-visited show cave in Germany, receiving around 350,000 tourists per year, and is an important economic factor for the town. Amongst its attractions are numerous calc-sinter flowstone drapes, colourfully tinctured by iron oxides. There are also many stalactites, stalagmites and stalagnates. Several pieces of calcite crystal formations were moved into the public area of the cave in order to be displayed there.

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).