If all goes well, I should have a 4 hour layover in Gothenburg in a couple of weeks, 10:30am - 2:30pm on a Friday. Connecting between separate tickets, so have allowed quite a bit of margin...

I went to Gothenburg city last year so I know it's a bit of a coach ride, and probably not worth it for that time. Is there anything of interest closer to the airport that would be more entertaining than spending 3.5 hours in the SAS lounge?