Confession: I have a minor obsession with abandoned places. The more crumbling, overgrown, and full of dangerous bits of rusted metal or roofs in imminent risk of collapse, the happier I am.
Here on the New Hampshire Seacoast, I've managed to squirm my way into some places I am patently not allowed to go (and will therefore not list here in a public forum).
Maybe it's the same reason I'm nuts for archaeology. Crawling around the ruins of modern society's abandoned places really isn't all that different from exploring what's left behind when other cultures and societies fade away or move on. Inhabited, maintained spaces have their mysteries, of course - my lit fic cohorts love to explore those, in all their twisty emotional glory - but they don't sing out at you like those in deserted places.