A few years ago I was sailing the Ionian sea. We sailed past an island, and decided to decided to lower the sails. We let the anchor claw into the seafloor and peddeled to the shore.
When exploring the island we found out it was completely abandoned. It seemed as if people just left, from one day to another. Buildings were crumbled, rooftops had collapsed. It was a complete ghosttown.
Later we found out the place was completely abandoned after it was hit by an earthquake in the fifties.