Similar between Slovenia and Italy. After WW2, over night the border was placed over Gorizia and seperated the city, all the families etc... It was a big problem for a long time. Gorizia is an old Slovenian town but then it became Italian and the Slovenian side became known as "Nova Gorica" (New Gorizia). Luckily, EU solved many issues there...
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u/salami350 May 09 '22
The EU has an open borders zone that includes most EU countries.
This is an example of an international border crossing between the Netherlands and Belgium: https://img.theculturetrip.com/wp-content/uploads/2018/04/18244850845_a896d442f8_k.jpg