The Devil's Appendix is the tallest single-drop waterfall

Waterfall

A waterfall is a place where flowing water rapidly drops in elevation as it flows over a steep region or a cliff.-Formation:Waterfalls are commonly formed when a river is young. At these times the channel is often narrow and deep. When the river courses over resistant bedrock, erosion happens...

 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 the Devil's Kitchen

Y Garn (Glyderau)

Y Garn is a mountain in Snowdonia, North Wales, part of the Glyderau.It is one of the Welsh 3000s — the 15 summits in Wales over 3,000 ft in height. It is the tenth highest peak in Wales. Moderate snow accumulations can take place on the western slopy side of the mountain from October to...

 in Cwm Idwal

Cwm Idwal

Cwm Idwal is a hanging valley in the Glyderau range of mountains in northern Snowdonia, the national park in the mountainous region of North Wales. Its main interest is to hill walkers and rock climbers, but it is also of interest to geologists and naturalists, given its combination of altitude ,...

, Snowdonia

Snowdonia

Snowdonia is a region in north Wales and a national park of in area. It was the first to be designated of the three National Parks in Wales, in 1951.-Name and extent:...

, Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

.

It is formed where a small stream falls for approximately 93 metres to reach the slopes above Llyn Idwal

Llyn Idwal

Llyn Idwal is a small lake that lies within Cwm Idwal in the Glyderau mountains of Snowdonia.It is named after a son of Owain Gwynedd, one of the ancient Princes of Wales, legend stating that the unfortunate offspring was murdered by being drowned in the lake.A number of small streams flow into...

. Depending on flow, it can be either an ice climbing route, a single drop waterfall, or a broken waterfall.