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Craco, Italy Craco was a medieval village built high up on a steep summit for defensive reasons, but recurring earthquakes eventually made it impossible to sustain. Today, less than 800 people live there in a commune, while the majority remains eerily uninhabited.
Centralia, Pennsylvania Centralia was once a prosperous mining town, but in 1962 a mine fire broke out, which continues to burn off the coal underground to this day. As a result, its population is 10 as of 2010, making it one of the least-populated municipalities in Pennsylvania.