This document defines tourism and its various types according to different classifications. It begins by defining tourism as temporary travel outside a person's normal environment for purposes like leisure, business, or other activities. Tourism is then classified according to destination as either domestic or international tourism. It is also classified according to the characteristics of the tourism system and tourists. Some major types discussed are cultural tourism, ecotourism, heritage tourism, medical tourism, and disaster tourism. The impacts and examples of different tourism types are provided. Tables with data on the top international tourist arrivals and receipts by country from the World Tourism Organization are also included.