In October 2013, Amnesty International commissioned analysis of satellite images of political prison camp (kwanliso) 15 at Yodok in South Hamgyong province and kwanliso 16 at Hwaseong in North Hamgyong province. This new document provides comprehensive assessments of kwanliso 5 and 16. The analysis is complemented by testimony from a former prison guard of kwanliso 16 and survivors from kwanliso 15. The North Korean authorities’ on-going investment in the country’s political prison camps is part of the continuing systematic, widespread and grave violations of human rights throughout the country.