Holland Krommeniedijk
In front of the fort I found this nice picture of the fort in winter time showing what you cannot see during the summer because the trees hide the fort.
Fort bij Krommmeniedijk
is also part of the:
Stelling van Amsterdam or Amsterdam Defense Line. The city of Amsterdam (Holland's capital) is surrounded by a chain of forts, dams and sleuzes with a length of 135 kilometer. They were built in a very short period (in between 1880 and 1914) after the French-German war of 1870-1871. Their purpose was to protect Amsterdam. The principal idea was to flood the land surrounding Amsterdam. In a military sense the chain of fortifications, dams and sleuzes was 100 % effective, it was impossible to break through this defense line, until ... the arrival of aeroplanes. By this the whole system became completely and totally obsolete. Since it is a unique defense system in this part of the world it was put on the Unesco World Heritage List in 1996.
If you want more info:
http://www.stelling-amsterdam.org/english/index.htm
The info on this site is in Dutch and in English
De info op deze site is in het nederlands en in het engels.