A piece of land that connects two continents is called an isthmus.

Here are some famous examples:

* Isthmus of Panama: Connects North and South America.

* Isthmus of Suez: Connects Africa and Asia.

* Isthmus of Kra: Connects mainland Southeast Asia to the Malay Peninsula.

Isthmuses are important geographical features because they can act as natural bridges for transportation and trade. They can also have significant ecological and strategic importance.