On Saturday 26 October, anyone who brings a carved pumpkin or turnip to the Dungeons will be able to go on a complimentary tour.
National Pumpkin Day recognises a favoured autumn decoration and food ahead of Halloween.
Visitors on the tour will be able to experience the Auld Reekie's ghostly history first hand as they take a trip through time to hear stories including witch trials, Burke and Hare, Mary King's Close and Sawney Bean's cannibal family.