The Greek peninsula is a land mass that juts out into the Aegean Sea and is surrounded by islands. Some synonyms for the Greek peninsula include the Peloponnese, Attica, and Hellas. The Peloponnese is the largest peninsula in Greece and is home to major cities such as Corinth and Sparta. Attica is a smaller peninsula that includes Athens, the capital city of Greece. Hellas is an ancient name for Greece and is sometimes used to refer to the entire country, including the Greek islands. The Greek peninsula is a historically rich and culturally significant region that has played an important role in shaping Western civilization.