The fortress on the Nekkerweg is one of the fortresses of the Defense Line of Amsterdam, which is part of the UNESCO World Heritage 'Dutch Water Lines'. This defense line was constructed between 1880 and 1914, 15 to 20 kilometers around Amsterdam.
This fortress caused a kink in the main defense line. To prevent Zuidoostbeemster from being flooded in the event of inundation of the Beemsterpolder, both the Nekkerweg and the Volgerweg were raised. This fortress was to prevent the enemy from moving easily via these two elevated roads.
The Fort on the Nekkerweg was not completed until 1912. The fortress was given another destination almost immediately afterwards. In 1918 it was used as a military prison. In the period since then, many conscientious objectors have served their sentences here. Virtually nothing remains of the original interior of the fort. However, the concrete machine-gun emplacements on the front wall have remained reasonably intact, as has the fort guard's house.
The fortress that used to house soldiers has now been transformed into a luxury eco-chic wellness resort, with two restaurants and 16 luxurious rooms and suites.