What is the name of the peninsula in Central America that borders the Caribbean Sea?

What is the name of the peninsula that separates the Gulf of California from the Pacific Ocean? Which peninsula is the location of the ancient city of Troy? Which peninsula is the location of the ancient city of Sparta? What is the name of the peninsula in Eastern Europe that is surrounded by the Black Sea and the Sea of Azov? What is the name of the peninsula in Eastern Asia that is home to the city of Vladivostok? Which peninsula is the location of the ancient city of Argos? What is the name of the peninsula that separates the Baltic Sea from the North Sea? Which peninsula is home to the city of Naples?