Nothern Ireland covers about 17% of the island of Ireland and is crisscrossed by uplands and low mountains; its best known landform is Lough Neagh, the UK’s largest freshwater lake.
The major mountain ranges include the Sperrin, the Mourne, and the Antrim Plateau which stretches along its northeastern coastline. Slieve Donard in the Mourne Mountains is the highest point, at just over 850 meters.
The Giant's Causeway on the north Antrim coast also is well known; it is an area of interlocking basalt columns, the byproduct of a volcanic eruption in ancient times. Some of the columns even reach 12 meters.
The largest rivers in Northern Ireland are the Bann, the Foyle, the Logan and Mourne.
Driving distance map of Northern Ireland (click to enlarge)