Radboud Castle

Radboud Castle commands a strategic IJsselmeer vantage point with 2-meter-thick walls, making it stronger than the average 13th-century stronghold that typically has 1.5-meter walls. Built by Count Floris V in 1287, its circular keep stands 28 meters tall, 10 meters taller than #5 Ammersoyen Castle’s tower. The castle endured three sieges, with canon ball damage still visible on its south face. Its proximity to water allows 45% of visitors to arrive by boat annually, making it more water-accessible than typical landlocked fortresses. Entry costs €13, including a guided tour of the 15 original rooms.