VisitScotland.com The official site of Scotland's national tourism organisation

By day Edinburgh is a bustling metropolis, but at night the old buildings and narrow closes take on a more sinister air. A long history of murder, torture, hangings and plague has left a haunting legacy on the city's Old Town, where ghostly apparitions now walk its streets.
 
Enter the underground vaults whose walls, it is said, have absorbed the memories of those who once lived and worked there. This part of the tour is not for the faint-hearted. Cling tightly to the person beside you: we try to leave with the same number as we had on going in!