Kitchen that has an underground Fridge
It’s not supposed to replace a normal fridge. It’s in addition to it.
Were I live we call it a “stabbur” or “kjølerom”. Basically a cold room to store food. Here it seems to be used mostly as a wine cellar. Of course, it’s not common for it to be this fancy. I haven’t seen any coolrooms larger than a closet. Stabbur can be the size of a small house though. Usually part of a farm.