Tourism is the act of travel for the purpose of recreation and business, and the provision of services for this act. Tourists are people who are "travelling to and staying in places outside their usual environment for not more than one consecutive year for leisure, business and other purposes not related to the exercise of an activity remunerated from within the place visited . The distance between these two places is of no significance.

A more comprehensive definition would be that tourism is a service industry, comprising a number of tangible and intangible components. The tangible elements include transport systems — air, rail, road, water and now, space; hospitality services — accommodation, foods and beverages, tours, souvenirs; and related services such as banking, insurance and safety and security. The intangible elements include: rest and relaxation, culture, escape, adventure, new and different experiences. Many countries depend heavily upon travel expenditures by foreigners as a source of taxation and as a source of income for the enterprises that sell export services to these travellers. Consequently the development of tourism is often a strategy employed either by a Non-governmental organization NGO or a governmental agency to promote a particular region for the purpose of increasing commerce through exporting goods and services to non-locals.
Naturalism is any of several philosophical stances, typically those descended from materialism and pragmatism, that do not distinguish the supernatural from nature. Naturalism does not necessarily claim that phenomena or hypotheses commonly labeled as supernatural do not exist or are wrong, but insists that all phenomena and hypotheses can be studied by the same methods and therefore anything considered supernatural is either nonexistent, unknowable, or not inherently different from natural phenomena or hypotheses.

Any method of inquiry or investigation or any procedure for gaining knowledge that limits itself to natural, physical, and material approaches and explanations can be described as naturalistic.Many modern philosophers of science use the terms methodological naturalism or scientific naturalism to refer to the long standing convention in science of the scientific method, which makes the methodological assumption that observable events in nature are explained only by natural causes,without assuming the existence or non-existence of the supernatural, and so considers supernatural explanations for such events to be outside science. They contrast this with the approach known as ontological naturalism or metaphysical naturalism, which refers to the metaphysical belief that the natural world is all that exists, and therefore nothing supernatural exists.

This distinction between approaches to the philosophy of naturalism is made by philosophers supporting science and evolution in the creation–evolution controversy to counter the tendency of some proponents of Creationism or intelligent design to refer to methodological naturalism as scientific materialism or as methodological materialism and conflate it with metaphysical naturalism to support their claim that modern science is atheistic. They contrast this with their preferred approach of a revived natural philosophy which welcomes supernatural explanations for natural phenomena and supports theistic science or pseudoscience.