| City | Country | Border Country | Population | % Correct |
|---|---|---|---|---|
| Seoul | South Korea | North Korea | 24,700,000 | 97%
|
| Ho Chi Minh City | Vietnam | Cambodia | 8,600,000 | 87%
|
| Kinshasa | DRC | Congo | 12,000,000 | 87%
|
| Singapore | Singapore | Malaysia | 7,800,000 | 87%
|
| Vancouver | Canada | United States | 2,750,000 | 83%
|
| Asuncion | Paraguay | Argentina | 2,300,000 | 80%
|
| Detroit | United States | Canada | 5,700,000 | 78%
|
| Lahore | Pakistan | India | 12,600,000 | 78%
|
| Tashkent | Uzbekistan | Kazakhstan | 3,175,000 | 78%
|
| San Diego | United States | Mexico | 3,325,000 | 77%
|
| Brazzaville | Congo | DRC | 2,175,000 | 76%
|
| Yerevan | Armenia | Turkey | 1,490,000 | 70%
|
| Tijuana | Mexico | United States | 1,950,000 | 69%
|
| Almaty | Kazakhstan | Kyrgyzstan | 2,025,000 | 67%
|
| Lome | Togo | Ghana | 2,025,000 | 63%
|
| N'Djamena | Chad | Cameroon | 1,360,000 | 58%
|
| Basra | Iran | Iraq | 1,490,000 | 43%
|
| Amritsar | India | Pakistan | 1,380,000 | 20%
|