In Dornoch, there is a rather unremarkable stone. It marks the spot where the last witch in Scotland was executed for witchcraft. The stone is actually in the back yard of a private home, but is well maintained and easily viewed from the street. Execution for practicing witchcraft was repealed 7 years after Janet Horne was executed.
If you believe your ancestor may have been accused of witchcraft, you can search the witch trials database at: http://webdb.ucs.ed.ac.uk/witches/