Is its proximity to Denmark. At least that's what many Swedes claim. I make no judgements, but Nyhavn in Copenhagen is a picturesque place to visit. Although you may want to avoid -5C and overcast as was the case on this day...
At first I got a bit furious seing this image in your gallery of Sweden - but very funny. Now I've seen so many pictures of Nyhavn in sunlight so this is a nice exception - I like thhe mood and the bit muted colours. v