Carrickabraghy Castle (Caisleán Charraig Bhrachaí) on a rocky outcrop at the north-western extremity of the Isle of Doagh in the north of Inishowen, a peninsula on the north coast of County Donegal, Ireland.
From the 9th to the 13th century Inishowen was politically divided into three 'tuatha' or districts. These were known as Aileach in the south, Bredach to the east and Carraig Bhrachai to the west. The Lords of Carraig Bhrachai ruled from the town-land of Carrickabraghy, the area where the Castle now stands. They were one of the most important families in Inishowen.
Carraig Bhrachai is not mentioned again in the history books until 1600. The present remains of the castle are thought to have been built around this time. The O Dochartaigh Clan had risen into power in Inishowen and the Chief of the clan and Lord of Inishowen was Sean Og O Dochartaigh. The English invasion of Ireland was well underway, and to protect his livestock and supplies from English raids, Sean Og decided the best place to store them was on The Isle of Doagh.
Around 1665 Carrickabraghy Castle was abandoned, and began to decline for several centuries.
The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.