Answer:
The Adriatic Sea, The Aegean Sea and the Black Sea.
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The Scandinavian peninsula borders the Baltic Sea, Gulf of Bothnia, North Sea, and Norwegian Sea. The Balkan Peninsula borders the Black, Aegean, Mediterranean, and Adriatic Seas The Italian/Apennine Peninsula borders the Ionian, Adriatic, Mediterranean, and Tyrrhenian Seas.
The two seas that lie between the Balkan Peninsula are the Adriatic Sea to the northwest and the Aegean Sea to the southeast. The Adriatic Sea separates the Balkan Peninsula from Italy, while the Aegean Sea lies between the peninsula and the coast of Asia Minor. Additionally, the Ionian Sea is located to the southwest, further linking the Adriatic and the Mediterranean.
The Balkans are a peninsula itself: the Balkan Peninsula.
The largest European peninsulas include the Iberian Peninsula, the Balkan Peninsula, the Scandinavian Peninsula, and the Apennine Peninsula. The largest European seas include the Mediterranean Sea, the Black Sea, the North Sea, the Baltic Sea, and the Caspian Sea (an inland sea).
The Balkan Peninsula. The Balkan Peninsula.
It is the Balkan peninsula, extending roughly from Croatia west to Bulgaria, and south to Greece, surrounded by the Adriatic, Ionian, Aegean, and Black Seas.
Iberian Peninsula, Italian Peninsula and Balkan Peninsula.
Southern Europe's most fertile land is located mainly in Italy and the Balkan Peninsula, typically along the coastline of the Adriatic or the Black Seas.
Balkan peninsula
Balkan peninsula is in Europe or (Eurasia in a five-continent-model).
Apennine Peninsula, Iberian Peninsula, Balkan Peninsula, Crimean Peninsula, Jultand Peninsula, Scandinavian Peninsula, Peninsula of Brittany. A few small ones: Kerch Peninsula, Attican Peninsula, Thracian Peninsula, Campanian Peninsula, Peloponnesian Peninsula.
Serbia is on balkan peninsula.