UNESCO Forteiland Pampus from the Netherlands

I visited Forteiland Pampus with the family, a day-trip to this tiny island that is part of the Defense Line of Amsterdam. The fort was built between 1887 and 1897 to defend Amsterdam against an attack from the river IJ. The vast quantities of material were delivered by ship out of Amsterdam. A German Company built the steel gun turrets. The whole Defense Line of Amsterdam ("Stelling van Amsterdam" in Dutch) was designated as a UNESCO World Heritage Site in 1996. It is a 135 km long ring of fortifications around Amsterdam, consisting of 42 forts located between 10 and 15 kilometers from the centre, and lowlands that can easily be flooded in time of war. On the island it is possible to buy and mail postcards with matching stamps depicting the site itself.