The wife and I visited here on 3d Jan 2021, the little building by the visitor hut not only has a tank of about 10gallons but also a low shelf beside it. We think it is a brew-house. I would add a picture, but I cannot see how to.
Here is a link to Viking brew-houses:
https://exarc.net/issue-2013-2/ea/where-were-viking-brew-houses
Something is not right. This message is just to keep things from messing up down the road