As a kid I was always fascinated by army bunkers. There are quite a few in Holland, the remains of the second World War when the Germans occupied the Netherlands. A bunker has a cave-like attraction on me: I want to go in and explore the unknown.
Photographer Jonathan Andrew has made a very appealing photo series about bunkers in Holland, Belgium and France. All bunkers are shot with a dark overtone that emphasize the grim history behind these structures. Interesting is also the information on his website about the type and function of each specific building. (via Swipelife)