Tourism is travel for predominantly recreation or leasure purposes or the provision of services to support this leisure travel. The World Tourism Organization defines tourists as people who "travel to and stay 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". Tourism has become a popular global leisure activity. In 2004, there were over 763 million international tourist arrivals.
Tourism is vital for many countries, due to the income generated by the consumption of goods and services by tourists, the taxes levied on businesses in the tourism industry, and the opportunity for employment in the service industrials associated with tourism. These service industries include transportation services such as cruise ships and taxis, accommodation such as hotels, restaurants, bars, and entertainment venues, and other hospital industry services such as spas and resorts.