* Gulag: This was the acronym for the Soviet forced labor camp system, which operated from the 1920s to the 1950s. The Gulag system included hundreds of camps located throughout the Soviet Union.
* Kolyma: The Kolyma region is located in the far northeast of Russia, and it was home to some of the most notorious Gulag camps. The Kolyma camps were known for their harsh conditions and high mortality rates.
* Norilsk: Norilsk is a city in the northern Krasnoyarsk Krai region of Russia. It was home to several large Gulag camps that were used for mining and other industrial projects.
* Solovetsky Islands: The Solovetsky Islands are located in the White Sea, and they were home to a large early Soviet prison camp. The Solovetsky Islands are now home to a monastery that is a UNESCO World Heritage Site.
* Perm-36: Perm-36 was a special prison camp that was used for political prisoners from 1946 to 1988. Perm-36 is now a museum that is open to the public.