Where in Ireland are plains and highlands located?

* The Central Plain

* The Western Plain

* The Southern Plain

Highlands

* The Derryveagh Mountains

* The Sperrin Mountains

* The Mourne Mountains

* The Wicklow Mountains

* The Galtee Mountains

* The Comeragh Mountains

* The Knockmealdown Mountains

* The Macgillycuddy's Reeks

* The Twelve Bens

* The Maumturks

* The Nephin Beg Range

* The Ox Mountains

* The Bluestack Mountains

* The Donegal Highlands