Devil's Appendix

The Devil's Appendix (Welsh: Nant Clogwyn y Geifr)^[1] 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.

Devil's Appendix
Nant Clogwyn y Geifr (Welsh)
Location	Snowdonia, Wales
Coordinates	53.109835°N 4.035335°W / 53.109835; -4.035335
Type	Plunge
Total height	93 m (305 ft)
Watercourse	Afon Ogwen tributary

The Devil's Appendix can be seen as a dark area to the right of the gorge on the right (Twll Du)

It is formed where a small stream falls for approximately 305 feet (93 metres) to reach the slopes above Llyn Idwal.^[2] Depending on flow and the ambient temperature, it can be either an ice climbing route, a single drop waterfall, or a broken waterfall.^[3]

See also

• List of waterfalls
• List of waterfalls in Wales