'Non-residential sheds' of Karelian Fortified Area (KaUR)

'Non-residential sheds' is an ephemeralism widespread among a wide circle of local historians of KaUR, denoting some interesting object on the ground, usually for military purposes, often located in hard-to-reach places and fenced with a barbed wire, sometimes even under armed guard. You should get in there, collect swag in a bag, film everything, post it in some closed public page, and scribble down the exact coordinates...

It owes its origin to the designation on old Soviet maps of abandoned (or classified) objects as Sar.nezhil.