Near the Giant's Causeway, on an isolated rock surrounded by the sea in a small bay, is the crumbling remains of "Dunseverick Castle". A maritime fortress of Dalriada, built by Sovaric, son of Eberic mythically in the year of the world 3668 a.m. once off the royal road from Tara, and once of the seats of the Kings of Ireland. It was stormed in 870 C.E. and then plundered again by Mave, the QUeen of Connaught at a uncertain date, starting a bloody war between Ulster and Connaught. When the castle was in the hands of Kinel Owen, in the 12th century, another disaster struck. When Turlough of Dunseverick returned from the Crusades, the castle was ransacked and massacred by Norwegian ships sparing only Lady O'Cahan, sister of Turlough. This beautiful young girl with dark hair and blue eyes, won the heart of the Norsemen, sparing her, and wedding him until the Norseman was slain by Turlough. The melee between the Norseman and Turlough caused the castle to catch fire, and the bride to plunge to her death off the cliffs resulting in the castle falling into ruins.
"And the villagers of olden times oft heard the wailing cry
Of the Norseman and brave young Turlough when waves were running high,
And old Dunseveric, gaunt and bare, has no sadder tale of woe
Recorded in its annals of the years of long ago."
The castle was later made the family residence of the O'Cahan family who were branched from the Kinel Owens, from about 1000 C.E. until 1320, regained again by the family in the mid 16th century. Was in the family hands until the 1641 rebellion when chief Gilladuff O'Cahan was taken by General Munro and hanged at Carrickfergus years after the rebellion. Munro destroyed all the castles in the area along the coast except Dunluce where he garrisoned English soldiers for the Cromwellian army. By 1662 most of Dunseverick was demolished except a piece of wall at the entrance six feet thick which his men were unable to remove. On the north side of the castle, is a well about three yards from the edge of he cliff, over 100' above the sea, that legendarily "Never goes dry". It is named the "Tubber Phadrick" or "St. Patrick's Well" and was considered one of Ireland's holiest wells as St. Patrick visited Dunseverick on several of his travels through the North. St. Patrick used to sit on a stone located by the well, named "St. Patrick's Rock", but this stone was tumbled into the well by General Munro's soldiers. Last to own and reside in the castle was Giolla Dubh O Cathain who left it in 1657. Now in ruins, only a small residential tower survived until 1978 until taken by the sea. Now just ruins of the walls remain. The castle is located in County Antrim near the small village of Dunseverick and about a mile and a half from the Giant's Causeway. Now part of the National Trust (1962) as passed on by local farmer Jack McCurdy.