We took a tour to the DMZ on our Korea trip. The standard tour takes 1/2 day and an extra half day trip can be added to the JSA zone. The first half day is nice and entertaining but you only go partway in the DMZ. As part of the first half day they show you the #3 tunnel dug by the North Koreans. A bit of a letdown actually because there is not much more to see than a small tunnel and going there for elder people is quite stressful.
But the second part of the day when you go to the JSA zone, is the real thing. A bit of an eerie atmosphere where you get to see the North Korean guards and if you are lucky you get to stand in North Korea in one of the negotiating huts. Space on the JSA tour seem to be limited so book early.
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