Landskrona Citadel built
1559 CE.
Shown on the map at 55.873°, 12.822°.
Landskrona Citadel (Swedish: Citadellet or Landskrona slott) is situated in Landskrona, Scania, southern Sweden. Much of the original work is intact. Examples remain of all major parts of the fortification, which is uncommon in such an accessible area. The moat around the central fortification is intact, as are the north-west and north-east parts of the outermost moat, which originally connected to a moat surrounding the city itself. Centermost, the citadel sits on an island surrounded by its own moat. North of the fort, between the second, third and fourth moat is Sweden's oldest allotment-garden. Several of its garden houses are attractions in themselves. Also the fortress castle itself hides both history as such as well as historical horrors, like the 16th Century dungeon in the old western tower, into which the unlucky prisoners were thrown down through a hatch. If surviving the 4-5 meter fall, there then was neither any daylight or any way out. Also the eastern tower has in later centuries served as a prison for those serving life sentences.
Text from the Wikipedia article Landskrona Citadel, licensed CC BY-SA 4.0.