| Borders of Doug |
| Europe |
| Albania - Macedonia |
| Albania - Serbia |
| Austria - Czech Republic |
| Austria - Germany |
| Austria - Hungary |
| Austria - Italy |
| Austria - Liechtenstein |
| Austria - Slovakia |
| Austria - Slovenia |
| Austria - Switzerland |
| Belarus - Latvia |
| Belarus - Lithuania |
| Belarus - Poland |
| Belgium - Germany |
| Belgium - Luxembourg |
| Belgium - Netherlands |
| Bosnia-Hercegovina - Croatia |
| Bulgaria - Greece |
| Bulgaria - Romania |
| Bulgaria - Turkey |
| Croatia - Hungary |
| Croatia - Slovenia |
| Czech Republic - Poland |
| Czech Republic - Slovakia |
| Denmark - Germany |
| Estonia - Latvia |
| Estonia - Russia |
| France - Germany |
| France - Luxembourg |
| France - Switzerland |
| Germany - Luxembourg |
| Germany - Netherlands |
| Germany - Poland |
| Germany - Switzerland |
| Greece - Turkey |
| Hungary - Romania |
| Hungary - Slovakia |
| Hungary - Slovenia |
| Hungary - Ukraine |
| Hungary - Serbia |
| Italy - Slovenia |
| Latvia - Lithuania |
| Latvia - Russia |
| Liechtenstein - Switzerland |
| Lithuania - Poland |
| Lithuania - Russia (Kaliningrad) |
| Norway - Sweden |
| Poland - Russia (Kaliningrad) |
| Poland - Slovakia |
| Poland - Ukraine |
| Portugal - Spain |
| Romania - Serbia |
| Slovakia - Ukraine |
| Total European borders 53 (61.6%) |
| America |
| Belize - Guatemala |
| Belize - Mexico |
| Canada - United States Of America |
| Total American borders 3 (7.7%) |
| Asia |
| Total Asian borders 0 (0.0%) |
| Africa |
| Total African borders 0 (0.0%) |
| Total border crossings 56 (17.9%) |
