Denmark suffered, for five years (the Dark Years as I have heard them described on a number of occasions) the land was under the control of Nazi Germany.
As with other places they invaded the Nazi’s wanted to protect their gains, and where there were coasts involved keep them secure.
And nowhere needed to be kept more secure than Grenen at the top of the country.
At Grenen the Skagerrak and the Kattegat meet. These are the entries (or exits) from the North and Baltic sea respectively and so a vital area to control.
With carefully built fortifications and big enough guns you can stop anything you don’t want entering the Baltic Sea entering.
Move forward over 60 years and the sand dunes on this part of the coast have helped Mother Nature reclaim most of the area, with many of the fortifications long since buried and slowly being crushed by the dunes.
But a couple of the bunkers have survived and today they are still serving their original duty of providing excellent views over the peninsular, only today rather than Guns it’s camera’s firing off regularly as holiday makers clamber over the ruins to reach their roofs for the views.