Those buildings including T2, where the agreement was inked, straddle the border and visitors like these veterans can walk from one end of a room to the other and cross briefly into communist North Korea.
While they do, they are being watched and photographed constantly by North Korean soldiers.
For former "K-Force" driver Tim Flintoff, 81, of Nelson who transported supplies and troops to the frontline long ago, it is an unpleasant sensation.
"Personally I don't think they're worth worrying about. I've got no time for the North Koreans, they're vicious people." His bitterness comes from the memory of the friends he lost during the war whose graves he will visit later this week.
"It gives me a chance to pay my respects," he says, fighting back tears.
The loss of his mates, the smell of the battlefield, the war damage and the poverty of the refugees he saw still affects him, but "I'd do it all over again if I had to", he said.
"It was important. What gets me is everybody back home, they think I'm important," he says before shrugging that off. "I just did what had to be done."