Located in Kilju county in North Hamgyong Province, Punggye-ri is the site where every nuclear test conducted by the DPRK has been carried out. The first test was carried out in 2006 and since then, 5 other nuclear tests of increasing power have taken place at the site.
Details of the Punggye-ri nuclear testing site are scarce. Although, entrances to tunnels dug deep into the surrounding mountains are visible in the area.
The site is connected to the national transportation system via the Paektusan Chongnyon Railway Line which is likely used to transport fissile material for testing between the various enrichment sites and the testing site.
As part of the 2018 thaw in relations between the DPRK and the United States, Pyongyang closed the Punggye site as a goodwill gesture. International journalists were invited to observe the demolition and, since May 2018, the site has been considered to be entirely defunct as a testing site.