# Dan yr Ogof

- **Country:** United Kingdom
- **Coordinates:** 51.830684, -3.687325
- **Access:** Dan yr Ogof Conservation Advisory Panel
- **Length:** 15500 m
- **Hazards:** Some parts avoided when on tour of caves
- **Language:** Welsh
- **Location:** Powys, Wales
- **Register:** Cambrian Cave Registry
- **Discovery:** 1912
- **Grid Ref Uk:** SN 83825 16021
- **Translation:** "Beneath the cave". The Morgan Brothers named the cave after their farm.
- **Photo Caption:** A cave passage with speleothems at Dan yr Ogof.

Dan yr Ogof , at the National Showcaves Centre for Wales, is a long cave system in south Wales, about north of Ystradgynlais and southwest of Brecon, in the Brecon Beacons National Park. It is the main feature of a show cave complex, which is claimed to be the largest in the United Kingdom and is a tourist attraction in Wales. The first section of the cave system is open to the public, but the extensive cave system beyond is scheduled as a national nature reserve and is open only to bona fide cavers.

![Photo of Dan yr Ogof](https://upload.wikimedia.org/wikipedia/commons/0/0b/Dan_yr_Ogof_caves_%289084%29.jpg)

**Source:** https://en.wikipedia.org/wiki/Dan_yr_Ogof (Wikipedia, CC BY-SA)