Bulgaria could be a part of Eastern or Southeastern Europe.
In the Balcans
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.
Bulgaria IS located in Europe.
Bulgaria is 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.
Serbia is located in Central-Southeastern Europe, and borders Hungary, Romania, Bulgaria, Macedonia, Bosnia-Herzegovina, Montenegro and Croatia.
Turkey and Bulgaria
The Danube River forms part of the boundary between Bulgaria and Romania.
Bulgaria is in SE Europe next to Greece, Serbia, Turkey, Romania and Macedonia. It is west of the Black Sea.at the bottom of Europe
Istanbul, part of Turkey
That is Turkey. :)
Europe, on the Balkan peninsula (Serbia and Bulgaria).
Russia