This is a piece of impassible terrain which I have made for several game systems, I see it being used in Frostgrave and Ghost Archipelago as well as Kings of war and in some circumstances Warpath and Pulp Alley.
Based on a card core with PVAcrete over the top then painted. This stack is a bit different as it has a hole through the middle, was looking for a alternative look.
Now with a few miniatures and other terrain added to give a sense of scale.
I threw the skeletons on because they were out from a game of Frostgrave Monday night.