Canusa Avenue or, in French, rue Canusa is the only part of the American–Canadian border that runs down the middle of a street. The street separates Beebe Plain, Vermont from the Beebe Plain area of Stanstead, Quebec and is a part of Quebec Route 247

Quebec route 247

Route 247 is a north/south highway on the south shore of the Saint Lawrence River in the Estrie region of Quebec. Its northern terminus is in Magog at the junction of Route 112 and its southern terminus is in Stanstead, at the junction of Autoroute 55 less than 1 kilometer north of the United...

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History

Local legend claims that a group of rather drunken surveyors, when given the task of determining the United States-Canada border line in the region (nominally at 45.00°N), decided to place the border right through the center of the village along what is now Canusa Street.

Today at the west end of Canusa are the Canadian and American customs. Immediately facing them is a solid granite building, which is also cut in two by the border. This building (built as a store in the 1820s) was for a time the world's only international post office. It had one postmaster, but two doors and two postal counters, each serving customers from a different country.