Lonely Planet EnglandLonely Planet
Guidebook
Lonely Planet England
Lonely Planet · 2025
Current Lonely Planet England covering Teesdale and Ullswater, the settings of High Force and Aira Force.
United Kingdom · Llandygai
Devil's Appendix
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.
Essentials guide
Facts from Wikidata and Wikipedia, compiled September 2026; season and access are our estimate, not a visit report. How we build these pages.
Devil's Appendix drops 93 metres (305 ft). It is a plunge-type fall, and the nearest base for a visit is Bethesda, United Kingdom. Access to the main viewpoint is rated moderate.
Summary adapted from the Wikipedia article (CC BY-SA 4.0).
As a plunge waterfall, water leaves the rock entirely and falls free through the air.
What you can do here
A walk-in-and-look waterfall
No commercial adventures run at Devil's Appendix itself — the experience is the approach and the view. Guided day trips from Bethesda are the easiest way to combine it with the area around it.
Also good forHikingPhotography
When to go
Spring snowmelt and rain make April to June the fullest months; October adds colour, and a hard winter can freeze the face.
Getting there
- Base town Bethesda, United Kingdom
- Country United Kingdom
- Region Llandygai, British Isles, Europe
- Access Moderate — a real walk — expect stairs, uneven ground or an hour on the trail
How it compares
This waterfall
Devil's Appendix
United Kingdom
Height93 mWidth—
Most similar
Dynjandi
Iceland
Height100 mWidth30 m
Also a plunge waterfall, of similar height and in Iceland
Largest curtain
Victoria Falls
Zimbabwe · Zambia
Height108 mWidth1,708 m
Largest single sheet of falling water
Tallest on earth
Angel Falls
Venezuela
Height979 mWidth—
Widest on earth
Khone Phapheng Falls
Laos
Height21 mWidth10,783 m
Measured across the whole multi-channel system
93 m
100 m
108 m
330 m
979 m
Devil's AppendixDynjandiVictoria FallsEiffel TowerAngel Falls
Khone Phapheng Falls
10,783 m
Victoria Falls
1,708 m
Dynjandi
30 m
Angel Falls is 11× taller than Devil's Appendix. Victoria Falls is 1.2× taller. We don't have a reliable crest width for Devil's Appendix yet, so it is left off the width chart. Tallest · widest lists.
Watch and read
Books worth packing
Lonely Planet ScotlandLonely Planet
Guidebook
Lonely Planet Scotland
Lonely Planet · 2025
Current Lonely Planet Scotland covering Glen Nevis, Kintail and the Moffat area.
The Rough Guide to ScotlandRough Guides
Guidebook
The Rough Guide to Scotland
Rough Guides · 2025
Current Rough Guide with Highland and Borders detail for Steall, Glomach and Grey Mare's Tail trips.
Lonely Planet WalesLonely Planet
Guidebook
Lonely Planet Wales
Lonely Planet · 2025
Current Lonely Planet Wales covering the Brecon Beacons (Bannau Brycheiniog) and its waterfall country.
On the map
53.10984, -4.03534
Quick answers
Where is Devil's Appendix?
Devil's Appendix is in United Kingdom (Llandygai). The nearest base is Bethesda, United Kingdom. Its coordinates are 53.1098, -4.0353.
How tall is Devil's Appendix?
Devil's Appendix drops 93 metres (305 feet). It is a plunge-type waterfall.
When is the best time to visit Devil's Appendix?
Peak flow is April to June and October. Spring snowmelt and rain make April to June the fullest months; October adds colour, and a hard winter can freeze the face.
What can you do at Devil's Appendix?
Beyond the viewpoints: hiking and photography. Access to the main viewpoint is rated moderate — a real walk — expect stairs, uneven ground or an hour on the trail.
How do you get to Devil's Appendix?
The usual base is Bethesda, United Kingdom. A real walk — expect stairs, uneven ground or an hour on the trail from there.
Nearby
Closest to Devil's Appendix
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Swallow Falls
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Pistyll Rhaeadr
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Dolgoch Falls
United Kingdom · 50 km away
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