# Pwll Dwfn

- **Country:** United Kingdom
- **Depth:** 104 m
- **Access:** Public
- **Length:** 561 m
- **Survey:** [https://www.cavinguk.co.uk/pwlldwfn/pwlldwfn-book.pdf Davies & Wilton-Jones 2019-25]
- **Geology:** Limestone
- **Language:** Welsh
- **Location:** Tawe Valley, South Wales
- **Registry:** [http://www.cambriancavingcouncil.org.uk/registry/ccr_registry_view.php?ID=275 Cambrian Cave Register]|register=}}
- **Difficulty:** Fully vertical, Single Rope Technique needed
- **Grid Ref Uk:** SN8332116494
- **Translation:** deep pit
- **Photo Caption:** Pwll Dwfn entrance
- **Pronunciation:** /pʊɬˈdʊvn/

Pwll Dwfn (, ) is a cave in the Black Mountain, South Wales. It is located in a dry valley northwest of Dan yr Ogof and cavers can access it from the show cave's car park. The entrance is not gated.

![Photo of Pwll Dwfn](https://upload.wikimedia.org/wikipedia/commons/e/ec/Pwll_Dfwn.jpg)

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