Devil's Appendix
title: "Devil's Appendix" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["llandygai", "waterfalls-of-gwynedd", "waterfalls-of-snowdonia"] topic_path: "general/llandygai" source: "https://en.wikipedia.org/wiki/Devil's_Appendix" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::data[format=table title="Infobox waterfall"]
| Field | Value |
|---|---|
| name | Devil's Appendix |
| type | Plunge |
| height | 93 m |
| location | Snowdonia, Wales |
| coords | |
| watercourse | Afon Ogwen tributary |
| native_name | cy |
| :: |
| name = Devil's Appendix | type = Plunge | height = 93 m | location = Snowdonia, Wales | coords = | watercourse = Afon Ogwen tributary |native_name=cy ::figure[src="https://upload.wikimedia.org/wikipedia/commons/9/9b/Cwm_Idwal_and_Llyn_Idwal.jpg" caption="The Devil's Appendix can be seen as a dark area to the right of the gorge on the right (Twll Du)"] ::
The Devil's Appendix () is the tallest single-drop waterfall in Wales and one of the tallest in the United Kingdom. It is a plunge style waterfall located on the Clogwyn y Geifr cliffs beside Twll Du in Cwm Idwal, Snowdonia, Wales.
It is formed where a small stream falls for approximately 305 ft to reach the slopes above Llyn Idwal. Depending on flow and the ambient temperature, it can be either an ice climbing route, a single drop waterfall, or a broken waterfall.
References
References
- (24 June 2020). "Rhaid Gwarchod Enwau Lleoedd". Ogwen360.
- Paul Williams, ''Rock Climbing in Snowdonia,'' Frances Lincoln, 2006 {{ISBN. 0-7112-2408-0
- "Snowdonia". CavingUK.
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