The harmony between great castles and their ornamental grounds is rarely seen in such a perfect form as at Johnstown Castle. The gardens and grounds were designed by Daniel Robertson, of Powerscourt fame, and they provide the perfect setting for this turreted, battlemented castle of gleaming silver-grey ashlar. The castle itself was home to two prominent Wexford families, the Esmondes and the Grogans, who have between them occupied the grounds from...