Reasons for traveling include recreation,[5] tourism[5] or vacationing,[5] research travel[5] for the gathering of information, for holiday to visit people, volunteer travel for charity, migration to begin life somewhere else, religious pilgrimages[5] and mission trips, business travel,[5] trade,[5] commuting, and other reasons, such as to obtain health care[5] or fleeing war or for the enjoyment of traveling. Travel may occur by human-powered transport such as walking or bicycling, or with vehicles, such as public transport, automobiles, trains and airplanes. Motives to travel include pleasure,[6] relaxation, discovery and exploration,[5] getting to know other cultures[5] and taking personal time for building interpersonal relationships. Travel may be local, regional, national (domestic) or international. In some countries, non-local internal travel may require an internal passport, while international travel typically requires a passport and visa. A trip may also be part of a round-trip, which is a particular type of travel whereby a person moves from one location to another and returns.[7]
