The final stop on the tour is a “time capsule” – a ladies’ lavatory block that has been untouched since its closure in 2013.
The gentlemen’s conveniences have been converted into a cocktail bar, but the ladies’, facing the Peace Gardens, have been left exactly how they were.
The basement toilets are accessed via moss-covered stone steps behind a street food truck, and the payment machine with its 20p fee is still on the wall outside.
There are still nappies in the vending machine, a kettle in the attendant’s room and a 2012 Olympics souvenir edition of Hello magazine.
It is hoped that the redevelopment of this fascinating jewel in Sheffield’s crown will make it as popular a stop on the tourist trail as Kelham Island, the Crucible Theatre and the Peak District.
For now, those on the tour will sense the ghosts of the city’s past walking beside them – from the steel barons to the Sheffield Pals, who enrolled in the council chamber to serve in World War One.