Tony Pleavin/Tourism Ireland
Even though Ireland is full of castles, it’s hard to beat the wonder of seeing the impressive Trim Castle, the largest Norman castle in the country. With its ditch, curtain wall, and moat, the castle covers 300,000 square feet on the south bank of the River Boyne. It was built by Hugh de Lacy around 1176, and it took 30 years to complete. Wander around the castle grounds or take a 45-minute tour inside the castle keep, learning everything from its turbulent history in medieval times to the spots where the movie Braveheart was filmed.