Kastellet was built among 1662 and 1725 and was a cornerstone of King Christian IV’s defenses of Copenhagen. It remains in use by the military and inside you can find very long, pink brick, slate-roofed properties, a parade ground, and in many cases a Dutch-type windmill. Why it’s magnificent: Have https://bookmarkity.com/story17160127/the-basic-principles-of-things-to-see-in-copenhagen-denmark