Slieve Donard in Newry, Mourne and Down District

You're standing on the summit of Slieve Donard, 850 metres above the sea. There's nowhere higher in Northern Ireland. This is the tallest of the Mourne Mountains, and the highest peak in all of Ulster. Have a look around. Down below is the town of Newcastle on Dundrum Bay, with the Irish Sea beyond. On a clear day you can see Belfast Lough to the north, Dublin Bay to the south, and the Isle of Man out to the east.