This abandoned ruin on the outskirts of Newtownstewart was once one of the strongholds of the O'Neill's. The castle is associated with Henry Aimbreidh O'Neill who died in 1392, it is uncertain whether the castle dates from the fourteenth or fifteenth century.

Little is known about this particular O'Neill, although one story has come down through the ages.

He is said to have hanged a total of nineteen men because the refused to marry his sister, because she was particularly ugly.