When we see a mansion, a natural tendency is to associate it with wealth and success. The sprawling gardens, flawless architecture and humungous square-footage leave us slack-jawed, often wishing for something that many of us will never have. Perhaps that’s a good thing? What we seldom realize is that some of these mansions come with a dark past – murder, mystery and sometimes meth. And in these cases, what was once desirable, is no longer. Here are 4 mansions with a nefarious past.