This is at City of Ripon Old Police Station. The building's origins go back to the late 17th Century but the part now occupied by the museum was built as Ripon Liberty Prison in 1816 and continued to function as such until May, 1878 when it along with numerous other local prisons throughout the country were closed as part of a reform of prisons. The building did not lie empty for long as in 1887 when the Ripon City Police Force was amalgamated into the West Riding Constabulary it became the Police Station for Ripon. The West Riding Constabulary occupied the building until moving to the present Police Station in North Street when it passed into private hands.
The use of the building when it was a Prison and later a Police Station are being interpreted in new displays in the revamped museum. In the yard are items such as a pillory, a pair of stocks, a whipping post and a Police Box, similar to Dr. Who's Tardis. Inside you will see a prisoner in a Victorian Cell and can also experience what it is like to be in a cell - empty except for you, a hard wooden bed and a slops bucket in the corner! Other displays illustrate the punitive exercises which were used in prisons, types of punishments meted out, transportation, the establishment of H.M. Prison Service.
On to the cache it’s a magnetic key safe with a strong magnet. There is an additional hint in the cache title.