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Devil's Appendix
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Location Snowdonia, Wales
Coordinates 53°06′35″N 4°02′07″W / 53.109835°N 4.035335°W / 53.109835; -4.035335
Type Plunge
Total height 93 m (305 ft)
Watercourse Afon Ogwen tributary
Cwm Idwal and Llyn Idwal
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 (in Welsh: Nant Clogwyn y Geifr) is a very tall waterfall in Wales. It is one of the highest waterfalls in the entire United Kingdom. This waterfall is a "plunge" type, meaning the water falls straight down without touching the rock face.

It is found on the Clogwyn y Geifr cliffs. These cliffs are next to a place called Twll Du in Cwm Idwal, which is a beautiful valley in Snowdonia, Wales.

What is the Devil's Appendix?

The Devil's Appendix is formed by a small stream. This stream drops about 93 meters (305 feet) down the cliff. It lands on the slopes above Llyn Idwal, which is a lake.

How the Waterfall Changes

The Devil's Appendix looks different depending on the weather.

  • When there is a lot of water, it looks like a powerful, single waterfall.
  • If the water flow is less, it might become a "broken waterfall." This means the water breaks into smaller streams as it falls.
  • When it is very cold, the water can freeze. This turns the waterfall into an exciting ice climbing route for adventurers!
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