Donegal Castle, Donegal Town, Co Donegal

Built by the O’Donnell chieftains in the 15th Century, beside the river Eske in Donegal Town, Donegal Castle was rebuilt in Jacobean style in the 16th century by Sir Basil Brooke, after Hugh O’Donnell burnt it to the ground rather than let it fall into enemy hands.

Information panels chronicle the history of the castle and guided tours are available.

Admission to OPW sites is free on the first Wednesday of every month until the end of 2011