More likely the former. In one of the maps I accidentally made a Sherman spawned upside-down about 2km up in the air. Kinda shocked the hell outta me when this Sherman falls down and lands on a barn.
Dr. SharKIt's prolly an easteregg. There is a building buried in the ground in Kubra, down at the bottom of the dam, under the hill. Prolly just left there by mistake or to confuse people
I never noticed a burried building anywhere