Back home, when I had a closer look at the image, I found something strange in it: There is a huge dark tower-like structure in the background, immediately to the left of the crane on the right side.
You can see the "tower" better in this detail of that area in the picture:
Could the "leaning tower" be the tallest building in Scandinavia, the Turning Torso in Malmö, about 70 km away from where the picture was taken? Maybe the atmospheric conditions created a mirage effect greatly magnifying the Turning Torso, which otherwise scarcely would be visible from this distance. Or is the "tower" the deformed mirage shape of a ship?
If you have some better explanation for the "tower", let me know.
Here is an image of the Turning Torso:
|The Turning Torso in Malmö.|
(image by Wikipedia)