Devil's Appendix
Introduction 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  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.
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