📜 Ruins of a 13th-century royal hunting lodge and scheduled ancient monument, locally known as "King John's Castle". 🔍 Features an octagonal keep and stands alongside the Basingstoke Canal. # Why Go 🏰 Explore medieval castle ruins and a historic site with connections to King John and the Magna Carta. 🚶 Easy walk along the canal towpath to reach the ruins. 🌳 Enjoy scenic countryside views and information boards about the castle's history. 🦇 Visit nearby Greywell Tunnel, a Site of Special Scientific Interest for bats. # Why Avoid ⚠️ Towpath can be muddy in wet weather. 💤 Now a ruin, limited standing structures. 💦 Access is alongside water, caution advised. # Tips 🐕 Dogs allowed on site.