In the usual neat and clear style of this artist/publisher, this is just what it says: a wind turbine.
It would be nice to have some indication of how high it is, although either the surrounding trees are pretty small or the beast is truly massive! Whilst you have a square grid on the ground to regulate movement if you are running a skirmish here you are going to have to wing it a bit if any characters decide to use the internal stairs to reach the cabin containing the generators - bent on sabotage, perhaps. Except as a vantage point, there doesn't seem to be much else reason for clinbing up there, certainly not one requiring the use of a battlemap (which kind of indicates the likelihood of combat).
Art is clear and crisp, well detailed; and the assembly instructions are likewise precise and easy to follow. I'm just struggling a bit to come up with a scenario in which I actually need to purchase a dedicated battlemap for a visit to a wind turbine but if you have one, well, here you are!