North Koreans are all over this mountain hiding in tunnels. Some of these tunnels are linked up into a big complex of tunnels, I am assuming they are blocked off just below the surface but I did not go in to check either!
Camera Details: SONY, ILCE-7M2 Settings: 1/60 at f/8, ISO 320, 28 mm Date: 09 April 2019 Time: 09:22:36