Watch this space for updates on The Leaning Tower of Pisa.
As one of my friends in the building trade is fond of saying: All structures are inherently unstable. 
I recall seeing photos of a maybe 6-10 apartment building atop a cliff overlooking an ocean falling over. The foundations did NOT go down to bedrock. Erosion took it down.
That’s the building that instantly came to mind for me. I saw it in the TV show Destroyed in Seconds.
Quick, somebody warn them!
