Originally posted by Flare |UKCS|:

The op said it was in the Swamp, probably a error on their part but it was claimed to be in the swamp...

... I havent had much Mountain time, love building too much and so I tend to get stuck at the swamp. :P

I've seen other posts that had this structure also in the swamp. It must be a rarely occurring cosmetic, placeholder or misplaced mountain type thing.