Killeen Castle Golf Course The Killeen Castle Golf Course in County Meath, Ireland, is a jewel of golf. It was designed by the famous golfer Jack Nicklaus. It is part of a lavish castle estate that extends over 600 acres. The course itself offers 18 holes of championship quality and is known for its strategic design that challenges golfers of all levels. The layout integrates the natural terrain with ancient woodlands, rolling hills and water hazards nestled into the majestic landscape. The exquisite fairways and fast greens are paired with the historic backdrop of Killeen Castle, a 12th century castle, making a game here an unforgettable experience. The club has hosted several prestigious tournaments, including the Irish Open. It is regarded as one of the best golf courses in Ireland.