No list of abandoned cities and deserted towns can be complete without some discussion of one of the strangest and most infamous example: Centralia. This once-thriving town had a mine fire decades ago … but it never went out. Warning signs that something was still wrong included: smoking highways, heated underwater gas tanks and person-swallowing sinkholes. Over time most of the town’s residents have moved on though a few insist on staying despite the slowly-spreading and still-burning fire that creeps below.