Witches' Stone
Witches' Stone is an historic stone in the Scottish parish of St Martins, Perth and Kinross. It marks the location where Macbeth meets with two witches in William Shakespeare's tragedy. It is first mentioned in text in 1806, when William Mackenzie, father of architect  William Macdonald Mackenzie, was the landowner. The stone, which first appeared on Ordnance Survey maps in 1866, stands around  high and has a groove on its top, believed to be the result of a chain being used on it. References 

Stones
Perth and Kinross