From the sky, it looks like a flower with five petals but this is actually a fortress. At the time when it was built, it was one of the best military constructions. Nowadays, the place serves mainly as a park, mostly to the locals and it's not swarming with tourists. There are several buildings inside of Kastellet, one of them is a big red windmill, which is actually still working, located at the top of one hill.
