StereoMike sent me a link to pictures of this tragic landslide in Germany.
In 1994 they turned a huge open pit mine into a lake, and a few days ago a section of land, about 400 by 1200 feet, slid into the lake without warning, at about 5 in the morning. Three people were sleeping in a semi-detached house that went with the slide and are presumed buried.
One picture I saw looked like there was a lake on the other side of this village also, but I'm not sure of that.
link