| City | City on the other side of the border | Contry on the other side of the border | % Correct |
|---|---|---|---|
| Vatican City | Rome | Italy | 100%
|
| Brazzaville | Kinshasa | Democratic Republic of the Congo | 89%
|
| Johor Bahru | Singapore | Singapore | 79%
|
| El Paso | Ciudad Juárez | Mexico | 74%
|
| Niagara Falls | Niagara Falls | Canada | 68%
|
| Akrotiri | Limassol | Cyprus | 63%
|
| Laredo | Nuevo Laredo | Mexico | 63%
|
| Kehl | Strasbourg | France | 63%
|
| Ivangorod | Narva | Estonia | 58%
|
| Sault Ste. Marie | Sault Ste. Marie | Canada | 58%
|
| Eilat | Aqaba | Jordan | 53%
|
| Nogales | Nogales | Mexico | 53%
|
| Vaals | Aachen | Germany | 47%
|
| Nova Gorica | Gorizia | Italy | 47%
|
| McAllen | Reynosa | Mexico | 47%
|
| Foz do Iguaçu | Ciudad del Este | Paraguay | 42%
|
| Gibraltar | La Línea de la Concepción | Spain | 42%
|
| Astara | Astara | Iran | 37%
|
| Baarle-Hertog | Baarle-Nassau | The Netherlands | 37%
|
| Brownsville | Heroica Matamoros | Mexico | 37%
|
| Gisenyi | Goma | Democratic Republic of the Congo | 32%
|
| Mouscron | Tourcoing | France | 32%
|
| Encarnación | Posadas | Argentina | 26%
|
| Heihe | Blagoveshchensk | Russia | 21%
|
| Salto | Concordia | Argentina | 16%
|
| Rivera | Santana do Livramento | Brazil | 5%
|