Black Dolphin Prison

Federal Governmental Institution — penal colony No. 6 of the Federal Penitentiary Service of Russia in Orenburg region, commonly known as the Black Dolphin Prison, is a correctional facility in Sol-Iletsk, Orenburg Oblast, Russia, near its border with Kazakhstan. The prison is one of the oldest in Russia, and one of the first in the Orenburg region to accept prisoners with life sentences. It gets its unofficial name from a prisoner-constructed sculpture depicting a black dolphin, which is set in front of the main entrance.

Originally, Black Dolphin was a jail for those sentenced to life at hard labor, since at least 1745. After the suppression of Pugachev's Rebellion in 1773, the prison was updated for the deportation and confinement of robbers.

Source: Wikipedia