What do you call a land surrounded by water on three sides?

A peninsula is a piece of land that is almost entirely surrounded by water but is connected to the mainland on one side. The surrounding water is usually understood to be continuous, though not necessarily named as a body of water.

For instance, they may be very large, as in the case of Arabia, or quite small. Peninsulas can be very small, sometimes only large enough for a single lighthouse.

Peninsulas are found on every continent. For example, in North America, the narrow peninsula of Baja California, in Mexico, separates the Pacific Ocean and the Sea of Cortez, also called the Gulf of California. In Europe, the nations of Portugal and Spain make up the Iberian Peninsula. The so-called Horn of Africa, which juts into the Arabian Sea on central Africas east coast, is a huge peninsula. The nations of North Korea and South Korea make up the Korean Peninsula in eastern Asia. In Australia, the Cape York Peninsula is only 160 kilometers (99 miles) from the island of New Guinea. The Antarctic Peninsula seems to point to the tip of South America, several hundred kilometers (miles) away.