Harbor

A harbor or harbour (see spelling differences), or haven, is a body of water where ships, boats and barges seek shelter from stormy weather, or are stored for future use. Harbors and ports are often confused with each other. A port is a facility for loading and unloading vessels; ports are often located in harbors.

Harbors can be natural or artificial. An artificial harbor can have deliberately constructed breakwaters, sea walls, or jettys, or they can be constructed by dredging, which requires maintenance by further periodic dredging. An example of an artificial harbor is Long Beach Harbor, California, which was an array of salt marshes and tidal flats too shallow for modern merchant ships before it was first dredged in the early 20th century.

In contrast, a natural harbor is surrounded on several sides by prominences of land. Examples of natural harbors include Sydney Harbour, Australia and San Francisco Bay, California.

Artificial harbors

Artificial harbors are frequently built for use as ports. 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. 2600-2550 BC, reign of King Khufu). The largest artificially created harbor is Jebel Ali in Dubai. Other large and busy artificial harbors include:

Skyline

A skyline is the horizon created by a city's overall structure, or by human intervention in a non-urban setting or in nature. City skylines serve as a kind of fingerprint as no two skylines are alike. For this reason, news and sports programs, television shows, and movies often display the skyline of a city to set a location. The term The Sky Line of New York City was first introduced in 1896, when it was the title of a color lithograph by Charles Graham for the color supplement of the New York Journal.

Paul D. Spreiregen, FAIA, has called a skyline "a physical representation [of a city's] facts of life ... a potential work of art ... its collective vista."

History

Early examples

The Colosseum in Rome

The Colosseum in Rome

Gizah pyramids

Gizah pyramids

Acropolis

Acropolis

Stonehenge's skyline has been known for millennia.

Stonehenge's skyline has been known for millennia.

Historic buildings in Toledo, Spain have been part of the city skyline for many years.