Travel by water often provided more comfort and speed than land-travel, at least until the advent of a network of railways in the 19th century. Travel for the purpose of tourism is reported to have started around this time when people began to travel for fun as travel was no longer a hard and challenging task. This was capitalised on by people like Thomas Cook selling tourism packages where trains and hotels were booked together.[10] Airships and airplanes took over much of the role of long-distance surface travel in the 20th century, notably after the second World War where there was a surplus of both aircraft and pilots.[7]
A travel warning, travel alert, or travel advisory is an official warning statement issued by a government agency to provide information about the relative safety of travelling to or visiting one or more specific foreign countries or destinations.[1] The purpose is to enable travelers to make an informed decision about a particular travel destination, and to help travellers prepare adequately for what may be encountered on their trip. In the United States, travel warnings are issued by the Department of State and are often called warden messages.[2][3]

Wait times are assessed automatically as follows: on departure, the passenger’s boarding pass is scanned when he/she enters the queue, then again just before he/she begins the individual screening process and, on arrival, when the passenger lines up in the visitors or residents queue in the primary inspection area and again when he/she exits from the area behind the customs officers’ posts.

Travel in the Middle Ages offered hardships and challenges, however, it was important to the economy and to society. The wholesale sector depended (for example) on merchants dealing with/through caravans or sea-voyagers, end-user retailing often demanded the services of many itinerant peddlers wandering from village to hamlet, gyrovagues (Wandering Monks) and wandering friars brought theology and pastoral support to neglected areas, travelling minstrels practiced the never-ending tour, and armies ranged far and wide in various crusades and in sundry other wars.[7] Pilgrimages were common in both the European and Islamic world and involved streams of travellers both locally (Canterbury Tales-style) and internationally.[9]
Travel dates back to antiquity where wealthy Greeks and Romans would travel for leisure to their summer homes and villas in cities such as Pompeii and Baiae.[7] While early travel tended to be slower, more dangerous, and more dominated by trade and migration, cultural and technological advances over many years have tended to mean that travel has become easier and more accessible.[8] Mankind has come a long way in transportation since Christopher Columbus sailed to the new world from Spain in 1492, an expedition which took over 10 weeks to arrive at the final destination; to the 21st century where aircraft allow travel from Spain to the United States overnight. 
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