The tourist brochure states these are Europe's largest survivng World War 2 fortifications. That may well be. I can personally attest to their largeness!
Before World War 2 the Kingdom of Denmark had pursued a policy of neutrality and almost complete disarmament. It was occupied in single day on 9 April 1940, simultaneously with the German invasion of Norway.
Dining a la fresco is something the Danes do at every opportunity. If they are to be believed, the weather only really allows this for a short time every year. During my month there the weather was like a Sydney winter - blue skies and 15 - 20 degrees every day.
Enlist in dozens of historical squadrons and choose between several historical planes for each campaign, with distinct missions for each campaign/plane combination. Mission types in these campaigns include air superiority, free hunt over enemy territory, bomber intercept, paratrooper intercept, ground attack, close air support, and many others mission types against dozens of potential target types in thousands of locations.