Every year for the last twenty years there has been a Viking market during the last week of June at Foteviken Viking Museum a few miles south of Malmö in Sweden. Hundreds of "Vikings" as well as visitors and curious onlookers come together to live as or look at Vikings in many ways. There are lots of market stalls and artisans show their skills as well as their wares. There are also reenactments of late Viking/early Medieval age fighting which always draw large crowds.
When you only have people in period costumes around, and you're walking around in the recreated Viking town it certainly feels (at least a little bit) like you're teleported back in time!