Tyburn (stream)
The Tyburn is a stream in London, which ran underground from South Hampstead through St. James's Park to meet the River Thames by Whitehall Stairs (near Downing Street and Thorney Street (between Millbank Tower and Thames House). It is not to be confused with the Tyburn Brook which is a tributary of the River Westbourne that is the next Thames tributary to the west on the north bank.
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