At the 38th Parallel, in the Demilitarized Zone. Specifically at Panmunjeom, a small village at the Demilitarized Zone, on July 27, 1953. This village is now a tourist spot where one can see (using binoculars) North Korean villagers across the border doing their daily chores. The zone is only 4 kilometers wide.

There are several different places called the Joint Security Area, but the one I am familar with is the one in the Korean DMZ. The DMZ is 4,000 meters wide, streching across the Korean peninsula for approximately 151 miles. Dividing the DMX is the Military Demarcation Line (MDL) which actually separates the souther half from the northern half. Approximatley one quarter of the way from the western edge of the DMZ is where the Joint Security Area lies, straddling the MDL. It is approximately 800 meters in diameter (though in an oblong shape) and is located near the old farming village of Panmunjom (or Panmunjeom), which no longer exists. The Joint Security Area is where all of the truce talks between the two Korea's take place, along with numerous lower level talks and many, many tours.