“America’s Small Town in Canada” is a CBS Sunday Morning short film about the Northwest Angle in the Lake of the Woods, a section of Minnesota that juts north into Manitoba (along its own border with Ontario).
The area exists because of an error in drawing maps in the 19th Century.
But visitors have to sign in and out with customs to leave and go through Manitoba to go shopping, along a dirt road.
There is one small public school. There’s one large family owned fishery and boat business.
I drove to the area in July 2001 on a Sunday morning, The dirt road is not very good. It was actually a hot day, in the low 90s.
Wikipedia attribution link for photo by Damanan5.