The small town of Derby Line in Vermont was built on the border. Literally ON the border.
A black line marking the international border between the United States and Canada runs in the middle of the Haskell Free Library and Opera House in Derby Line, Vermont Wednesday June 12, 2013. The 103-year-old building was built as a symbol of friendship between the two nations.Giant flower pots block the road crossing to Canada in Derby Line, Vermont
The border was even more porous when I crossed in 2011. There was no flower pots « guarding » the International border.
Canadian and American border is pictured between Derby Line, Vermont, and Stanstead, Quebec, Sunday August 7, 2011.