Slightly off-topic; I see you mentioned the Ytterby quarry. I was raised on Resarö, and unfortunately the quarry has been filled to prevent accidents. Don't expect cave spelunking. However, don't let this deter you from visiting: the view from the quarry is still beautiful, the land around it still has strange glimmering rocks lying around, Resarö (and Vaxholm island) are still beautiful places to visit by their own, and you also have the Vaxholmskastellet that I'd suggest you visit if you are in the area.
Thanks. I didn't expect much to be there which is why I did the solar system instead. That and I couldn't pinpoint exactly where it was. Maybe next time.