Foto's
上河口村 (Shanghekou Village) - 청수 (Chongsu) (People's Republic of China - North Korea)
Ollagüe - Avaroa (Chile - Bolivia)
Valença - Tui (Portugal - Spain)
Gries am Brenner - Brenner-Brennero (Austria - Italy)
Hendaye - Irun (France - Spain)
Bad Nieuweschans - Bunde (Netherlands - Germany)
Latour-de-Carol-Enveitg - Puigcerdà (France - Spain)
Lanaken - Maastricht (Belgium - Netherlands)
Noorderkempen - Breda (Belgium - Netherlands)
Bad Nieuweschans - Bunde (Netherlands - Germany)
Zelzate - Sas van Gent (Belgium - Netherlands)
Narva - Ивангород (Ivangorod) (Estonia - Russian Federation)
Ashford - Lille (United Kingdom - France)
Vilar Formoso - Fuentes de Oñoro (Portugal - Spain)
Zevenaar - Elten (Netherlands - Germany)
Montzen - Aachen West (Belgium - Germany)
Bayerisch Eisenstein - Železná Ruda (Germany - Czech Republic)
Città del Vaticano - Roma S. Pietro (Holy See (Vatican City State) - Italy)
Hamont - Weert (Belgium - Netherlands)
Видин (Vidin) - Calafat (Bulgaria - Romania)
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