“The international border between the U.S. and Canada passes through the center of a library” is one of the images accompanying BLDGBLOG: Unsolving the City: An Interview with China Miéville.
Also:
Technically, any time anyone crosses the international line, they are subject to having to report, in person, to a port of entry inspection station for the country they are entering. This makes traffic on the streets that cross the line without a checkpoint, Maple Street/Rue Ball and Pelow Hill/Rue Lee fairly light, as it is more convenient to cross at Main Street/Rue Dufferin, where checkpoints are often set up for “drive thru” service.
Pedestrians on the sidewalk are also technically required to report as soon as they cross the line. Visiting someone on the other side of the line, even if the building is next door, means walking around to the inspection station first, or risk being an outlaw. Playing catch on Maple Street/Rue Ball would be an international event, and would break no laws presumably, so long as each time the ball was caught, the recipient marched over to customs to declare the ball.
More at the Center for Land Use and Interpretation.
