These churches from all over the world are not victims of natural disaster, they all sit in the valley of a reservoir. Many reservoirs were created in valleys with small towns or villages nestled in them, the benefit of having reservoirs always outweighed the cost in relocating a small population. In many of these settlements the religious buildings were the tallest and once the valleys were flooded they could still be seen poking out of the water in a surreal post apocalyptic manner. Lots of them still survive, making more of an appearance every time the water level drops.
Among these examples are Ladybower, Graun, Panta de Sau, Tehri and Potosi