I just realised that we’ve forgotten to do our annual trip to Fiskars this summer! An ironworks with the surrounded village was founded in Fiskars and another one nearby in Billnäs in the mid 17th century . Fiskars still manufactures (at least) steel items, most known for their scissors, but operates now from the former Billnäs ironworks. Fiskars old and pretty works has been taken over by pretty much all kind of arts, crafts and design. It is so beautiful there! And it is free to enjoy all the buildings, the surrounding nature, and the workshops and exhibitions.
While you are at it, you may also want to take a look at the medieval ruins of Raseborg fort. They are only a short drive away in Snappertuna. Next to is a lovely little red cafe and the summer theater of Raseborg (shows in Swedish, often for the whole family and worth the price!).