Dead Man's Hole

Under Tower Bridge. Bodies were dumped into the Thames here -- easier to do at high tide, natch.

I found this on the internets: "Before Tower Bridge was built, a ferry ran from Horselydown Steps, near the southern foot of today's bridge, to a point on the north bank known as Dead Man's Hole - so called because the ferrymen operated a lucrative sideline taking corpses across the river. The reason was simple. Bart's Hospital, on the north side, paid 6d more for the bodies used for medical research than Guy's Hospital on the south."

See where this picture was taken. [?]