Built in the 17th century, it is not very big. The wall is 4,5 meters thick. There are six cannons on it. I heard it was used to prevent Denmark from attacking earlier, but it has never been used. It can overlook the whole city of HAGA. It has a super view. When it comes up, it takes a steep staircase. It feels like a hundred steps to the sky. When it comes down, it is a restaurant or a very good place. I recommend you to play.