When a Tiger is tired and lies down
And I thought our town's potholes were bad!
What the heck did it fall into? Looks a bit big for a water main or some such.
I wondered too, but if that's an IS-2 in background, this might be Berlin, Vienna or Budapest with all the possible utilities, subways, waterways, other passageways of any big city. Streets were weakened by shelling and not built for 70-ton tank traffic.