Norwegian Jordkjeller (Earth Cellar)
Here’s a comment by poster ilekjer at Instructables.com: I was actually planning to build an earth-cellar, kinda like the ones built here in Norway for a couple of thousand years. They were/is used primarily for storing vegetables and food. They hold the temperature roundabout 8-10 °C in summertime and about 4-6 °C in the winter. … Read more