Wohaa! What a find I have made! I went to the local museum at Österö and in a box there I found an old piece of paper that caught my attention. The paper was really old and fragile, but there was an map drawn on it. I took a quick (bad) photo of the map because it was closing time and I did not have time to look closer on it directly. My phones flash did not do a good work in the dark museum, therefore I have had a really hard time to try to see from the photo all details from the map. I made an digital map from the photo. At first I had no clue what part of the earth the map describes. When I finally figured it out I just had to go to the place and hide an geocache there (sorry, a boring pet in a tree). Can you also figure out where the treasure is hidden?
At bogus coordinates is a small private harbor. Do not go there and do not use it. Go instead to the parking area that I have marked.
(Allowed coordinate error to get it right 30 meters.)