Reminds me of the 1966
coal-slag disaster in Aberfan, Wales in which a coal-waste mountain cascaded down, smothering an elementary school and a bunch of houses, killing 16 children and 28 adults.
You can't even see the school in this picture; it is completely covered:
![](http://ihrr.files.wordpress.com/2011/10/aberfan_disaster.jpg)