Fort Dunree (Irish: An Dún Riabhach), located on the west side of the Inishowen peninsula in the north of Ireland, is a Napoleonic period fort. The fort is located on a rocky promontory accessed over a natural fissure. It was remodelled in 1895 to have 2 x 4.7 inch (119 mm) QF guns below, and later 12 pounder (5 kg) QF and 2 x 6 inch (152 mm) guns in a battery above. The top of a hill overlooking the site was walled in to form a redoubt.
The fort is now a military museum with detailed exhibitions, many restored guns, and a rotting military camp. There are also displays about the area birds, marine life and coastal vegetation.
Other facilities include a gift shop, auditorium, café and trail walks.