Diorama
Koreans don't like maps, but apparently they love dioramas. So do I. Here are several pictures of the diorama on display at the observatory. The lower center of the diorama is the area of the observatory.
This is of the area east of Chorwon, between there and Kumhwa with north to the top of the picture. The two lines made of screen are the northern and southern borders of the DMZ. I believe tunnel number two is located near the outpost in the lower center shown by circular screen, and I assume the road leading to it is the road we took. Once again, I believe the coordinates on the Kumhwa map are vertical 52 horizontal 41. Two and a half miles east southeast is Outpost Crush Communism, but this is not on the diorama. I believe the white line on the left is the rail line. The large hill in the upper right due east from the S curve in the railroad may be Hill 717 or Sobang-San.
This is just west of the previous picture with north once again being the top. The flat area in the lower left is near the observatory. The flat area near the top is the flat land in the Iron Triangle. Jackson Heights must be somewhere in the picture, but I'm not sure exactly where. I believe the white line extending from the SW to NE corner is the rail line. On my map I have marked as Jackson Heights the hill just south of the S curve in the railroad.