Johnstown Castle is a cool Gothic Revival castle in County Wexford, Ireland. It was built between 1836 and 1872 on the site of an older tower house from the late 12th century. The castle has a fascinating history, including being used by Oliver Cromwell's army and later becoming an agricultural college. Nowadays, it's managed by the Irish Heritage Trust and open to the public after some renovations. So, if you're into castles with a bit of a story behind them, Johnstown Castle is definitely worth checking out!