There are several (at least 15) buildings directly on the US-Canada border, but they are all east of the Great Lakes, with the exception of the Peace Chapel at the International Peace Garden in Manitoba and North Dakota. I am unaware that any of these has an official designation as being a trading or meeting point, as the small building in Panmunjam is on the N-S Korea border. Most of the borderline buildings are private homes, the Haskell Library and Opera house, a couple of grocery stores, a bar (which was abandoned in the early 1990s, although someone lives in the apartment above it), and a few barns in Vermont/Quebec and Maine/Qeubec. Unless one of these has some official designation, I'm unaware of such a place. Actually, now that I think of it, I heard about four years ago that both governments were going to try to make border crossings more efficient, and as part of this plan, they were going to work together to build a couple of joint customs/immigration buildings somewhere in the prairies. I'm not sure if this ever came to fruition or not. In this case, they might have a line across the floor and the building could be used for such purposes. Does anybody know about this new style of US-Canada border crossing facility? I believe I have some old IBC reports that mention it as a prototype.
Dallen