The "casu marzu" is a cheese that is eaten with worms living inside. Only eaten in Sardinia. Italy .
Although it is illegal is prepared in many parts of the island. It should be eaten with glasses as the larvae of the cheese can skip to the eyes.
The name of the cheese means "rotten cheese" in Sardinian. Maggots are fly larvae Piophila casei.
It's so famous that even Gordon Ramsey show us the cheese in this video: