# Seegrotte Hinterbrühl

> former gypsum mine and underground production facilities of National Socialism, now show mine in Lower Austria, Austria

**Wikidata**: [Q667775](https://www.wikidata.org/wiki/Q667775)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Seegrotte)  
**Source**: https://4ort.xyz/entity/seegrotte-hinterbr-hl


## References

1. Virtual International Authority File
2. Freebase Data Dumps. 2013