Headed to Stockholm next month for a quick 3.5 day trip, and am having a hard time figuring out which transit passes cover which modes of transport. We'll be taking the Arlanda Express into town, staying on Skeppsholem and will primarily be in and around downtown - Ostermalm, Norrmalm, Gamlastan, Sodermalm and Djurgarden. I understand that Arlanda Express is on its own ticket, but is there a transit pass that covers local ferries (e.g. Skeppsholem - Slussen) and subways? Where do I purchase it? I'm finding conflicting explanations all over the internet so hoping someone here can set me straight. Thank you!