A few years ago, it was in vogue to imagine a post-apocalyptic world retaken by nature. But it really doesn't take much imagination; just browsing through local listings, we've found a half-dozen homes that Mother Nature has started to encroach upon. Most of these homes are distressed properties, and almost all of them are described as "investment opportunities" and teardowns that "need TLC." Know of a place that the Chicago wilderness is trying to reclaim? The Curbed tipline is open.