Dunmoe Castle situated in a tranquil spot and commands a spectacular location overlooking the river Boyne. It once marked the boundary of the English Pale. The Castle was built in the 15th Century and was home to the D'arcy family. The Castle, originally a four turreted structure, is now, through years of ruin, reduced to just two.

During the Cromwellian invasion in 1649 the Castle was fired upon from the South bank by passing troops on their way from Drogheda to Athboy, but avoided any real damage even during the Battle of the Boyne in 1690. It remained intact until it was destroyed by fire during the 1798 rebellion and today visitors can see what remains of the four-storey castle. It can be found between Navan and Slane.

Near the castle is a small overgrown chapel and graveyard with a crypt containing members of the D'Arcy family