Greece is located in Europe. To be clear it is not part of the Middle East. It is in the area of the Balkans and belongs to the continent of Europe.
It is part of the Balkans in Southern Europe
Bulgaria is located in Southeastern Europe.
Bulgaria IS located in Europe.
Sofia is the capital of Bulgaria, a country located in southeastern Europe.
Istanbul, Turkey is located in the western part of Turkey. The closest country to the city is Bulgaria which is located in Europe.
Greece has been part of the continent of Europe geographically for millions of years. It is located in southeastern Europe, sharing borders with other European countries like Albania, Bulgaria, and Turkey.
Serbia is located in Central-Southeastern Europe, and borders Hungary, Romania, Bulgaria, Macedonia, Bosnia-Herzegovina, Montenegro and Croatia.
Europe, on the Balkan peninsula (Serbia and Bulgaria).
Romania is situated in the South-Eastern part of the Europe.
Turkey and Bulgaria
The Danube River forms part of the boundary between Bulgaria and Romania.