Chongjin concentration camp
North Korea
Kwan-li-so (Penal-labour colony) No. 25 Chongjin (25), often known outside North Korea as Chongjin concentration camp (also spelled Ch'ŏngjin), is a political labour camp (kwalliso) in North Korea located in the North Hamgyong Province. Satellite images show a major expansion of the camp after 2010.
Prison data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).