Fort Dunree

Built against Napoleon like Ned's Point, but this is an altogether sturdier battery on a scenic outcrop. It was disused after 1815 but re-armed later in the century, and stood ready through the First World War. In 1938 it was one of the last fragments of British territory handed over to the Republic of Ireland: a few "Treaty Ports" and their defences had been kept on after independence in 1921. The Irish army used the fort until 1986 then it became a museum.