Caucasus GuideThe Caucasus mountain range runs between the Black Sea and the Caspian Sea, largely following Russia's southernmost border. It is considered part of the natural boundary between Europe and Asia. HotelsFind hotels in Yerevan, Tbilisi and more. GeorgiaGeorgia is a country in the Caucasus. It lies at the eastern end of the Black Sea, with Turkey and Armenia to the south, Azerbaijan to the east, and Russia to the north, over the Caucasus Mountains. ArmeniaArmenia is a landlocked country in the Caucasus that is bordered by Turkey to the west, Georgia to the north, Iran to the south, Azerbaijan to the east, and Azerbaijan's Naxcivan exclave to the southwest. AzerbaijanAzerbaijan is a former Soviet republic in the Caucasus and variously considered part of Europe or Asia. AbkhaziaAbkhazia is a de facto independent sate that seceded from — but is still claimed by — Georgia. Nagorno-KarabakhNagorno-Karabakh, officially the Nagorno-Karabakh Republic, is a de facto independent republic in the Caucasus. South OssetiaSouth Ossetia is a de facto independent state that seceded from — but is still claimed by — Georgia.