Final answer:
Bulgaria is the country south of Romania, north of Greece and Turkey, east of Macedonia and Serbia, and west of the Black Sea on the Balkan Peninsula.
Step-by-step explanation:
The country located in the Balkan Peninsula, south of Romania, north of Greece and Turkey, east of Macedonia and Serbia, and west of the Black Sea is Bulgaria. Bulgaria is a nation with a rich history and diverse landscapes including the Black Sea coast and the Balkan Mountains.
It has been a crossroads between continents, with a major trans-European corridor running through it. The territory of Bulgaria has also been shaped by its historical contexts, such as being part of the former Yugoslavia and experiencing transitions after the breakup of that state.