Waterfront GC, near Smith Mountain Lake in Virginia, has an old chimney in play on the 11th hole.
Ballyhack is incorporating two large silos into its clubhouse.
The ruins on Old Tabby Links are very cool, though not really in play.
A The Olde Farm, old hog fences were reassembled after construction. I'm not sure if they're still there.
My post is useless without photos.
WW