It's often described as Edinburgh's most haunted location - and yet it was stumbled upon by accident.
Back in the 1980s, Scotland rugby internationalist Norrie Rowan discovered a tunnel leading to a series of vaults under South Bridge that had been concealed for well over 100 years.
Norrie had been doing work on his pub, the Tron Tavern, at the time and couldn't quite believe what he had found. The rooms were filled with all manner of debris, much of which had lain undisturbed since the mid-19th century.