Which peninsula is the location of the ancient city of Argos?

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 Central America that borders the Caribbean Sea? What is the name of the peninsula in Eastern Asia that is home to the city of Vladivostok? 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? Which peninsula is part of the country of Sweden? Which peninsula in Asia is home to the countries of Thailand, Malaysia, and Singapore?