The term harbor is often used interchangeably with port, which is a man-made facility built for loading and unloading vessels and dropping off and picking up passengers.
The oldest artificial harbor known is the Ancient Egyptian site at Wadi al-Jarf, on the Red Sea coast, which is at least 4500 years old (ca.
A natural harbor is a landform where a section of a body of water is protected and deep enough to allow anchorage.
Some examples are: For harbors near the North and South poles, being ice-free is an important advantage, especially when it is year-round.
Examples of these are: The world's southernmost harbor, located at Antarctica's Winter Quarters Bay (77° 50′ South), is sometimes ice-free, depending on the summertime pack ice conditions.