📜 The world's tallest box hedge, part of Birr Castle's formal grounds in Offaly, Ireland.🔍 Planted 300 years ago, it stands close to 40 feet tall, recognized by Guinness World Records. It is also home to the historic Leviathan of Parsonstown, a reflecting telescope once the largest in the world. # Why Go 🌳 Witness the world's tallest box hedge🏰 Explore historic Birr Castle Demesne and its award-winning gardens🔭 Discover the Great Telescope and Ireland’s Historic Science Centre, marveling at 19th-century engineering and astronomical innovation, learning about early discoveries of nebulae and spiral galaxies, and observing celestial objects through the reconstructed telescope.🚶 Enjoy peaceful walks among rare plants, rivers, and waterfalls # Tips 🐕 Dogs welcome on short leash (not in Science Centre/playground).🅿️ No on-site parking; use public car park or street parking.ℹ️ The original speculum mirror of the Leviathan is displayed at the London Science Museum. # Cost 💰 Included with General Admission to Birr Castle Demesne. # Hours 🕒 Gardens & Science Centre: Daily 09:00-16:00. Castle/Café hours vary seasonally. # Getting There 🚗 Birr can be reached by car in 2 hours from Dublin.