South Caucasus , also referred to as Transcaucasia or Transcaucasus , is the southern area of the Caucasus region between Europe and Asia , going from the Greater Caucasus to the Turkish and Iranian borders , between the Black and Caspian Seas . The South Caucasus is a geopolitical region located on the border of Eastern Europe and Southwest Asia also referred to as Transcaucasia , or The Transcaucasus . More specifically , the South Caucasus area spans the southern portion of the Caucasus Mountains and its lowlands , lying between the two continents of Europe and Asia and extending from the southern part of the Greater Caucasus Mountain range of southwestern Russia and going southerly to the Turkish and Armenian borders , traveling between the Black and Caspian Seas .