The Elms, Smithfield
During medieval times, Smithfield was one of the most important places in London, full of jousting, livestock grazing, summer fairs and, of course, the occasional execution.
Famous dissenters and heretics who muttered their last breathe at The Elms include William Wallace (of Braveheart fame, who was executed here in 1305) and Wat Tyler, although the latter was only murdered here during a disagreement with the Lord Mayor of London and wasn't actually executed. In fact, modern day visitors to this area of Smithfield may want to avoid visiting during the hours of darkness as rumour has it that those executed here may haunt it still.
Types of execution at The Elms ranged from burning at the stake (for heretics) to the tried and tested hanged-drawn-and-quartered method for those convicted of high treason. For those unfamiliar with this method, it involves being dragged by a horse to the place of execution, hanged until almost dead, then disembowelled whilst still conscious, beheaded, and finally being chopped into four pieces (i.e. 'quartered) and subsequently having these pieces put on display across the city. In fact, many of the decapitated heads were then taken to the medieval London Bridge to adorn the gatehouse as a deterrent against would-be criminals entering the city.
During the reign of Henry V in the early 1400's, it is thought that the gallows were removed from Smithfield to nearby Tyburn, a site where public executions would continue for centuries more. The fate of the Elm trees at Smithfield is not known, but by the time of John Stow's Survey of London in 1598 they had long since disappeared.
Coordinates: 51°31'06.51"N 0°06'04.05"W