In the shadow of the sand dunes, juxtaposed against the beautiful, wild beach of Houvig, these Brutalist concrete structures provide a stark reminder of the Nazi occupation of Denmark during World War II.

Now empty, dank, and graffitied, these weathered concrete blockhouses are nevertheless worth a visit for any history, architecture, or photography buff. They also form a wondrous hide-and-seek playground for older children visiting the beach.

And if you visit after dark, the bunkers provide the perfect platform from which to almost touch the profusion of stars in the heavens over the North Sea of Denmark.