Who is the hilly major peninsula in Greece?

The hilly major peninsula in Greece is the Peloponnese. It is renowned for its mountainous terrain, rich history, and significant archaeological sites, including ancient Olympia and Mycenae. The peninsula is bordered by the Ionian Sea to the west and the Aegean Sea to the east, and it is connected to the mainland by the Isthmus of Corinth. The Peloponnese played a crucial role in ancient Greek civilization and continues to be a popular destination for tourists.