Which countries border only one other country?

Which countries border only one other country?
While most island nations have no neighbors at all, there are ten non-island countries that share a border with only one country.
The ten countries are:
Canada (which borders the U.S.A.), Monaco (which borders France), San Marino (which is surrounded by Italy), the Vatican City (which is surrounded by Italy), Gambia (surrounded on all but their coast by Senegal), Qatar (which borders Saudi Arabia), Portugal (which borders Spain), Denmark (which borders Germany), Lesotho (which is surrounded by South Africa), and South Korea (which borders North Korea).