FORTIFICATIONS IN THE NETHERLANDS
In times of war land used to be flooded in order to stop the enemy. Fortifications controlled the few accessable parts. Over the centuries two main defences were built – the newest one being the Nieuwe Hollandse Waterlinie. With the arrival of warplanes and airtransport the defences became useless . The air however provides great opportunities to capture by drone the fortifications amidst their waterrich environment.