In fact Magadan is not a prison but a territory - a Russian North Pacific. Magadan is a remote city, there is a Kolyma river known to have a permafrost bottom. In order to get there you have to drive on “the road of bones” (of the prisoners who built it). In fact Magadan district was a place of numerous prison camps until 1950s notorious for it’s high death rate due to a harsh climate conditions. Most of them were closed in 1950s with a dismantling of Stalin’s gulag system.
Thank you for the interesting information. :)