The oldest part of what was Helsinki County Prison dates back to 1837. Over the years it was extended, became a remand prison before closing in 2002 when it was refurbished and reopened as Hotel Katajanokka. They have left a single solitary confinement cell and a rather grim looking group-cell exactly as they were for visitors to check out... Although, as you can see, I'm sure the narrow metal staircases and location of the "rooms" would probably be familiar to former inmates.
