Het Waterliniepad
The 'Waterlinie' path is a long distance hiking trail (LAW 17) in the Netherlands following the 19th century defence works that were build around Amsterdam called the "Stelling van Amsterdam" and in Utrecht called the "Nieuwe Hollandse Waterlinie".
The first time I walked a section of the trail was with my sister on the 15th of August 2019 on a hike from Houten to Culemborg.
That was when I decided to buy the trail guide and make an effort to walk the 350 km of the trail.
Most parts of both defence lines were build from 1870 onward and were build in lowlands that could be floaded with about 30 cm of water (too little for boats) in case an enemy was approaching.
The whole defence line became obsolete with the development of tanks and airplanes.
Both defence lines are now a UNESCO World Heritage Sites.