Landlocked country one, making them the biggest contiguous group in the world. Also, the Central Asian and Caucasian clusters can be considered contiguous, joined by the landlocked Caspian Sea. Mongolia is almost part of this cluster too, being separated from Kazakhstan by only , across Russian or Chinese territory. There are the following "single" landlocked countries (each of them borders no other landlocked country): If the Caucasian countries and Kazakhstan are counted as part of Europe, then Europe has the most landlocked countries, at 20. If these transcontinental countries are included in Asia, then Africa has the most, at 16. Depending on
Landlocked country added two "de facto" states with no or limited international recognition: A country is "doubly landlocked" or "double-landlocked" when it is surrounded entirely by one or more landlocked countries (requiring the crossing of at least two national borders to reach a coastline). There are two such countries: There were no doubly landlocked countries from the unification of Germany in 1871 until the end of World War I. Liechtenstein bordered the Austro-Hungarian Empire, which had an Adriatic coastline, and Uzbekistan was then part of the Russian Empire, which had both ocean and sea access. With the dissolution of Austria-Hungary in 1918