A ghost town, deserted city, or abandoned city is an abandoned village, town, or city, usually one that contains substantial visible remaining buildings and infrastructure such as roads. A town often becomes a ghost town because the economic activity that supported it (usually industrial or agricultural) has failed or ended for any reason (e.g. a host ore deposit exhausted by metal mining). The town may also have declined because of natural or human-caused disasters such as floods, prolonged droughts, extreme heat or extreme cold, government actions, uncontrolled lawlessness, war, pollution, or nuclear disasters. The term can sometimes refer to cities, towns, and neighborhoods that, though still populated, are significantly less so than in past years; 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, in the United States, Barkerville, British Columbia, in Canada, Craco in Italy, Aghdam in Azerbaijan, Kolmanskop in Namibia, Pripyat in Ukraine, Dhanushkodi in India and Fordlândia in Brazil.
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 of the Soufrière Hills Volcano in 1995 and has remained so.
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.