Ballymoon Castle is one of Ireland's strangest medieval castles — a 13th-century Norman fortress.

Ballymoon Castle in County Carlow is one of the most unusual Irish castles ever built — a massive 13th-century Norman fortress with huge curtain walls, arrow loops and eight projecting towers, yet no chambers, no tower house and no roof. Believed to have been started by the powerful Carew family, this unfinished stronghold shows the ambition ...