Slieve Gullion stands at 573 metres, the highest point in County Armagh. It is an extinct volcano and is the most spectacular example of a ring dyke anywhere in the British Isles. It's believed ...

Slieve Gullion, at its centre. Built up of layers of igneous rock, this mountain, the heart of the ancient volcano, possesses a slightly stepped profile. To its south-east are the Cashel Loughs, which ...