I've shot all of these photos in the park area around Görvälns slott during evening time in June and early August a couple of years ago. For reference: I had the castle's main entrance behind me when I photographed the woman in the yellow dress. The couple in the first photo is walking down to the white bridge seen in some of the photos, the castle is located out of frame camera left.
(I'll bring mosquito spray BTW!) :)