County Donegal: See
Cliffs, sea stacks and mountains adorn much of the coast. Prominent peaks are Slieve League, Slieve Naght in the north, Errigal in the middle and the Bluestack mountains in the south.
Folk museums include the Famine Village Museum near Carndonagh, the flax and corn mill at Newmills west of Letterkenny, and Glencolmcille folk village.
Railways in Donegal were blighted by Partition, but a narrow-gauge network kept going well into the 20th century. Find it in Donegal Town and at Fintown east of Glenties, though the best exhibits are in the Ulster Transport museum at Holywood near Belfast.
Prehistoric sites abound. Best of them are Grianan of Aileach at Burt west of Derry, the Kilcooney tombs and Lough Doon fort north of Glenties,
Guns and watchtowers against Napoleon were set up at many points on the coast. Best preserved are those on Lough Swilly, as they remained in later use, to 1986 at Fort Dunree near Buncrana.
Islands: Arranmore and Tory Island are inhabited and have ferries. Gola Island has summer cottages and a ferry. Inishtrahull, 10 km off Malin Head, is the most northerly part of Ireland and is uninhabited; boat trips seldom visit as its name is Irish for "dangerously exposed landing beach, think twice!"