What is the most famous Mafia?

The Italian-American Mafia, also known as the Cosa Nostra or the American Mafia, is the most famous Mafia organization. It is a criminal organization that originated in the late 19th century and is based in the United States. The Italian-American Mafia is known for its organized crime activities, including extortion, drug trafficking, gambling, and racketeering. It has also been involved in numerous high-profile crimes, such as the assassination of President John F. Kennedy.