Climbing the garden tower is free, of course, if you have Copenhagen Card. This is a good place to overlook Copenhagen, but the fees are not economical enough. The Kristianburg Palace Tourist Tower is free to climb and visitors can wait in line. But because the number of people released at each time is limited, it may take some time to queue up. But it's not inferior here to look at Copenhagen as a whole. And the tower was used by the royals in the past.