The Slieve League cliffs on the southern coast of Donegal are among the highest sea cliffs in Europe, rising 601 metres from the Atlantic in a series of sheer and wildly coloured faces — iron red, gold, brown, and green depending on the rock type and the light. They are three times the height of the Cliffs of Moher and carry a fraction of the tourist infrastructure, which means the experience of standing at the edge is raw rather than managed.
The easiest approach is from Teelin village, where a small car park gives access to a path that climbs steeply to the cliff edge. From there you can walk along the top in either direction, with vertiginous views down to the Atlantic and across to the Sligo mountains on a clear day. The complete ridge walk to the summit and back takes three to four hours and involves sections of genuine exposure — the One Man's Pass near the summit is a narrow rock ridge with drops on both sides. Come prepared for wind and rain regardless of the forecast; conditions change fast.