Treacle mines often form an integral part of the identity of the villages that hold them. Persuading children or gullible outsiders of the mine's existence can often lead to complicated backstories being created - for example that the mine in Chobham was used to make sticky bombs and limpet mines during the First World War, although only in winter.
In Lancashire, the town of Sabden used to run correspondence about local treacle mining. Apparently a local toy company sells figures of treacle miners, including the Great Treacle Eating Boggart. The 1990s children's TV show The Treacle People was set there.
Lesser known extensions of the treacle mine idea are porridge quarries, and jam sandwich mines.