"If I could only do one ghost tour while in Edinburgh, I'd go with Mercat Tours: they offer over half a dozen different ghost tours, including tours in the haunted vaults, the graveyard, and through the Old Town, and they’re the only company in the city that offers vault tours during the day. They also run tours in French and German, tickets start at 22 GBP, and they clearly know their stuff." - Matthew Kepnes