Set in the beautiful Hillsborough Forest and built on the site of the old Magennes stronghold, the Fort was founded in 1630 by Peter Hill and completed around 1650 by Colonel Arthur Hill. The Fort consists of a square enclosed by an earthen rampart with outer stone facing. This stone facing rises above the rampart level to form a parapet wall. It was constituted a Royal Fort by Charles II. William of Orange spent several nights at the Fort on his way south
to the Boyne in 1690.