Kara katorga
Kara katorga (Russian: Карийская каторга, romanized: Kariyskaya katorga) was a set of katorga prisons of extremely high security located along the Kara River in Transbaikalia (a tributary of the Shilka River, flowing into it at Ust-Karsk) and part of the system of Nerchinsk katorga.