What is a peninsula?

A peninsula is a landform that extends out into a sea, lake, or other body of water, with water on most of its sides but a land connection to a bigger mainland. The word comes from Latin words meaning almost an island. Peninsulas range enormously in size, from small rocky headlands to vast regions like the Arabian Peninsula, the largest in the world. They often form important coastlines with long shorelines relative to their area, making them valuable for ports, fishing, and trade throughout history. Some countries, such as Italy and Korea, occupy prominent peninsulas that have shaped their culture and strategic importance.