There is a vacant home on the next street over from my house. I watched as week by week it degenerated. The windows got boarded up, the foxglove took over as the grass died out, the fence lost a board or two, just enough so when you walked by you caught glimpses of strange shapes and weird lights at night. No kidding, this house had gone from sad to freaky in a few months flat.
Vacant houses like that can be a real problem. Read all about how it is affecting Arcadia and what they are doing about it in my most recent Arcadia Weekly article.