Silent Pool
From Tardis Wiki, the free Doctor Who reference
The Silent Pool was a lake near the Eddison Manor in England. In 8 December, 1926, Agatha Christie, the Tenth Doctor and Donna Noble drowned the Vespiform Reverend Golightly in this lake. The next day, Agatha's car was found by the side of the lake. (TV: The Unicorn and the Wasp) The name of the lake is not mentioned in-story, but its name is on a sign.
