You might need to squint, but the lighthouse is actually there, on this card mailed in 2021 with its large stamp, and postmark.  By the way, Cape Arkona is a 45-metre high cape on the island of Rügen in Mecklenburg-Vorpommern. It forms the tip of the Wittow peninsula, just a few kilometres north of the Jasmund National Park. Grade: 1