Kastellet was designed between 1662 and 1725 and was a cornerstone of King Christian IV’s defenses of Copenhagen. It remains to be in use by the military and inside there are prolonged, purple brick, slate-roofed buildings, a parade ground, as well as a Dutch-design windmill. Why it’s wonderful: Have you https://econopass.com/travel/10-must-see-and-do-in-copenhagen/