A harbor is a sheltered area along a coastline where ships and boats can dock safely. It provides protection from rough waters and harsh weather, allowing vessels to load and unload cargo or passengers. Harbors can be natural, formed by the geography of the land, or artificial, created by human engineering. Harbors are essential for trade and transportation, connecting different regions and countries. They often include facilities such as docks, warehouses, and fueling stations. Major cities like New York and San Francisco have significant harbors that support their economies and facilitate maritime activities.