Slieve Gallion Mountain offers views of mountains in 7 different counties in Ireland, and on clear days with visual aids Scotland can be seen from its top
Slieve Gallion is a mountain in County Londonderry, Northern Ireland. It is the easternmost of the Sperrin Mountains. It reaches a height of 528 metres and dominates the western shore of Lough Neagh, the summit is marked with a well-worn, 'leaning tower of Pisa' trig pillar.