A huge flee market that occures two times a year, once in spring the other in the fall. Take the subway to Solna centrum and take the 3 min walk to the big sports arena where the fleemarket is held. There is lots of retro and vintage and a good potential of finding bargains.
Close to the water this park has animals, swings, climbing frames and playhouse. I place for families to play with there kids, but in the evening the area is occupied by teenagers.
The best late night snack in Stockholm. Together with your last beer, order the french fries with bearnaise at the bar and share it with your friends. Junk food gone deluxe.