Cliffs:

Slieve Leauge:
The Slieve League (Grey Mountain) cliffs, situated on the West coast of Donegal, are said to be the highest and one of the finest marine cliffs in Europe with a three hundred metre drop straight down into the wild, Atlantic waves below. If it's just a place for a dramatic picnic or a full day's hiking - then this is the place to come! One is advised to leave one's car and walk the 2-3 km to the cliffs so as not to miss the exciting scenery of the area. There are terrific views of the sea and the Sligo Mountains to be seen. Donegal Bay can be clearly seen as you walk towards the terrifyingly high top of Slieve League and there is a small lake at eye level. A short walk will take you to the right of the amazing cliff face of Bunglas (which literally means end of the cliff) which rises over 306m above the raging ocean. One Man's Path will take you to the summit of Slieve League but the climb must be approached with extreme caution as it is very dangerous.
Horn Head

This is probably the most dramatic of the beautiful Donegal peninsulas. Nature has painted the landscape with broad, bold strokes and the sculptured rocks and cliff faces are awesome in their majesty. You get a real sense of the power of the sea and the resilience of the land on this wild peninsula.
There are two splendid viewpoints, one of the north side where the cliffs dominate the scenery, and the other on the south side overlooking Dunfanaghy with the backdrop of Muckish and the Derryveagh mountains where the hostel is situated.
Click on the links on the left for more ideas