What Fortress used as a palace and prison has the Festning tunnel running underneath it?
Festning Tunnel The Festning Tunnel (Norwegian: "Festningstunnelen" ) is a motorway tunnel on European Route E18 in the city center of Oslo, Norway. The tunnel has two tubes, with three lanes in each. It runs from Bjørvika, under Akershus Fortress, The City Hall Square and Vika to Filipstad. The tunnel is 1800 m and -45 m elevation at the deepest.
Sinop Fortress Prison Sinop Fortress Prison, (Turkish: "Sinop Kale Cezaevi" ) was a state prison situated in the inside of the Sinop Fortress in Sinop, Turkey. As one of the oldest prisons of Turkey, it was established in 1887 within the inner fortress of the centuries-old fortification located on the northwestern part of Cape Sinop. The prison was closed down in 1997 and the inmates were transferred to a modern prison newly built in Sinop.