Came across my photos of the 1831 London Bridge in Lake Havasu which I used in Throwback Thursday on Surewhynotnow:
http://surewhynotnow.blogspot.com/2018/08/throwback-thursday-1831-london-bridge.html
My fiance pointed out just now that the 1831 Bridge subsiding several inches on the River Thames would technically mean that the "London Bridge was falling down."