* The Florida Peninsula: This is the most obvious, extending south from the southeastern United States and separating the Gulf of Mexico from the Atlantic Ocean.
* The Yucatan Peninsula: This peninsula, located in Mexico, juts out towards Cuba from the southern edge of the Gulf of Mexico.
While not as directly pointed towards Cuba, you could also include:
* The Baja California Peninsula: This peninsula extends south from California, though it is more oriented towards the Pacific Ocean than Cuba.