Romania.
Bulgaria is directly south of Romania.
Bulgaria, The black sea and Georgia are all north of Turkey
Yes, Greece is a European country bordered on the north by Albania, FYROM and Bulgaria and the south by the Mediterranean Sea.
To the north of the European part of Turkey are Greece and Bulgaria; to the west of Romania is Hungary.
Two European countries that begin the letter "B" are Belgium and Bulgaria. Belgium is next to France and Germany, and Bulgaria is South of Romania, and North of Greece.
Riviera in the north to European Turkey in the south, along 378 km of coastline
Ancient Thrace corresponds to an area that today would cover Southern Bulgaria, North Eastern Greece and European Turkey.
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Bulgaria is at the South of Romania but it is under 450 latitude.
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