# subterranea

> underground space, natural and man-made underground structures

**Wikidata**: [Q863404](https://www.wikidata.org/wiki/Q863404)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Subterranea_(geography))  
**Source**: https://4ort.xyz/entity/subterranea


## References

1. BBC Things
2. BabelNet
3. National Library of Israel Names and Subjects Authority File