A ghost town is an abandoned village, town, or city, usually one that contains substantial visible remains. A town often becomes a ghost town because the economic activity that supported it has failed, or due to natural or human-caused disasters such as floods, government actions, uncontrolled lawlessness, war, or nuclear disasters. The term can sometimes refer to cities, towns, and neighborhoods that are still populated, but significantly less so than in years past; for example those affected by high levels of unemployment and dereliction.
Some ghost towns, especially those that preserve period-specific architecture, have become tourist attractions. Some examples are Bannack, Montana; Calico, California; Centralia, Pennsylvania; Oatman, Arizona; and South Pass City, Wyoming in the United States; Barkerville, British Columbia in Canada; Craco in Italy; Elizabeth Bay and Kolmanskop in Namibia; Pripyat in Ukraine; and Danushkodi in India. Visiting, writing about, and photographing ghost towns is a minor industry.
The town of Plymouth on the Caribbean island of Montserrat is a ghost town that is the de jure capital of Montserrat. It was rendered uninhabitable by volcanic ash from an eruption.
The definition of a ghost town varies between individuals, and between cultures. Some writers discount settlements that were abandoned as a result of a natural or human-made disaster or other causes using the term only to describe settlements that were deserted because they were no longer economically viable; T. Lindsey Baker, author of Ghost Towns of Texas, defines a ghost town as "a town for which the reason for being no longer exists". Some believe that any settlement with visible tangible remains should not be called a ghost town; others say, conversely, that a ghost town should contain the tangible remains of buildings. Whether or not the settlement must be completely deserted, or may contain a small population, is also a matter for debate. Generally, though, the term is used in a looser sense, encompassing any and all of these definitions. The American author Lambert Florin's preferred definition of a ghost town was simply "a shadowy semblance of a former self".