Haskell Library in Derby Line, Vermont sits on the US and Canadian border. The entrance is on the US side but to browse the books you would have to enter Canada. The only indication one would have that they had left their country is a fading black line across the floor.
The library’s patrons are both Canadian and American. The building is 106 years old and has enjoyed an informal immunity to border restrictions. Due to new concerns over immigration and national security, some are questioning if this should be changed.
Derby Line, and the town of Stanstead, Quebec on the other side, have a few unguarded streets which lead across the border. There are signs stating that you should stop at an immigration office down the road but the office is easily avoided and Derby Line has become an increasingly popular illegal point of entry.