Snaefell is the highest mountain and the only summit above 2,000 feet (610 m) on the Isle of Man, at 2,037 feet (620.9 m) above sea level. The summit is crowned by a railway station, cafe and several communications masts.

While highly dependent on weather conditions and visibility, all of the four countries of the United Kingdom can be seen from the summit of Snaefell. This includes much of the southern coast of Dumfries and Galloway in Scotland, the Lake District in England, the northern coast of Anglesey in Wales, and the Mountains of Mourne in Northern Ireland. Points in the Republic of Ireland in County Louth can also be seen.

The A18 Snaefell Mountain Road passes over the slopes of Snaefell, and is the highest section of the Snaefell Mountain Course over which the Isle of Man TT Races are held. Walkers often use the car park on this road near the Bungalow railway station (last railway stop before the summit) from which there is a rough path to the peak.

More Info: en.wikipedia.org