"One of the most chilling tours I did took me through the underground vaults with City of the Dead: the vaults were used as storage space and workshops in the 1780s, abandoned in 1795, and later became slums and a red-light district full of brothels and pubs; moving through the vaults in the dark creates an atmosphere of unease, and I think exploring the vaults is probably the best of all the ghost tours in the city. Tickets start at 17 GBP." - Matthew Kepnes