Water-based defense lines
Muiderslot castle is part of four Dutch water-based defense lines, which were built to defend the nation against its enemies. By flooding piece of land in a controlled manner, the enemy was kept away. The castle is part of the Utrechtse Waterlinie, Oude and Nieuwe Hollandse Waterlinie, and Stelling van Amsterdam. The latter was meant to defend the capital, such a smart solution that it is famous around the world. Stelling van Amsterdam is now a UNESCO World Heritage Site.