A natural harbor is a coastal area where the water is protected from strong winds and waves, making it safe for ships to dock. These harbors are formed by geographical features such as cliffs, islands, or bays that provide shelter. Natural harbors are often deep enough to accommodate large vessels, which makes them ideal for trade and transportation. Many major cities, like San Francisco and Sydney, are built around natural harbors due to their strategic advantages. These locations facilitate maritime activities, including shipping and fishing, and contribute to the economic growth of the surrounding regions.