<P> Territory leased or ceded by one country to another for perpetual use, but not in sovereignty, such as Guantanamo Bay Naval Base in Cuba, or memorials, such as the American Cemetery in France, do not constitute true territorial borders, because the land occupied remains a formal part of the host country . </P> <P> This list is based on the Correlates of War Direct Contiguity data set, with causeways and bridges not being counted . </P> <Table> <Tr> <Th> Country </Th> <Th> Neighbour </Th> <Th> Border length (km) </Th> <Th> Border length (mi) </Th> <Th> Notes </Th> </Tr> <Tr> <Td> Brunei </Td> <Td> Malaysia </Td> <Td> 381 </Td> <Td> 237 </Td> <Td> </Td> </Tr> <Tr> <Td> Canada </Td> <Td> United States </Td> <Td> 8,893 </Td> <Td> 5,526 </Td> <Td> </Td> </Tr> <Tr> <Td> Denmark </Td> <Td> Germany </Td> <Td> 68 </Td> <Td> 42 </Td> <Td> </Td> </Tr> <Tr> <Td> Dominican Republic </Td> <Td> Haiti </Td> <Td> 360 </Td> <Td> 220 </Td> <Td> </Td> </Tr> <Tr> <Td> The Gambia </Td> <Td> Senegal </Td> <Td> 740 </Td> <Td> 460 </Td> <Td> </Td> </Tr> <Tr> <Td> Haiti </Td> <Td> Dominican Republic </Td> <Td> 360 </Td> <Td> 220 </Td> <Td> </Td> </Tr> <Tr> <Td> Ireland </Td> <Td> United Kingdom </Td> <Td> 360 </Td> <Td> 220 </Td> <Td> </Td> </Tr> <Tr> <Td> Lesotho </Td> <Td> South Africa </Td> <Td> 909 </Td> <Td> 565 </Td> <Td> </Td> </Tr> <Tr> <Td> Monaco </Td> <Td> France </Td> <Td> 4.4 </Td> <Td> 2.7 </Td> <Td> </Td> </Tr> <Tr> <Td> Papua New Guinea </Td> <Td> Indonesia </Td> <Td> 820 </Td> <Td> 510 </Td> <Td> </Td> </Tr> <Tr> <Td> Portugal </Td> <Td> Spain </Td> <Td> 1,214 </Td> <Td> 754 </Td> <Td> </Td> </Tr> <Tr> <Td> Qatar </Td> <Td> Saudi Arabia </Td> <Td> 60 </Td> <Td> 37 </Td> <Td> </Td> </Tr> <Tr> <Td> San Marino </Td> <Td> Italy </Td> <Td> 39 </Td> <Td> 24 </Td> <Td> </Td> </Tr> <Tr> <Td> South Korea </Td> <Td> North Korea </Td> <Td> 238 </Td> <Td> 148 </Td> <Td> </Td> </Tr> <Tr> <Td> Timor - Leste </Td> <Td> Indonesia </Td> <Td> 228 </Td> <Td> 142 </Td> <Td> </Td> </Tr> <Tr> <Td> United Kingdom </Td> <Td> Ireland </Td> <Td> 360 </Td> <Td> 220 </Td> <Td> </Td> </Tr> <Tr> <Td> Vatican City </Td> <Td> Italy </Td> <Td> 3.2 </Td> <Td> 2.0 </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Country </Th> <Th> Neighbour </Th> <Th> Border length (km) </Th> <Th> Border length (mi) </Th> <Th> Notes </Th> </Tr>

Name the country that has only one neighbour
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