Fifty or sixty years ago travelling abroad for most people was an unrealizable dream. Only the wealthy with a lot of time on their hands could afford to travel to a foreign country for a holiday and even for them the idea of going to South America, Africa or Asia would have been pretty much unthinkable.
The development of air transport over the past few decades has changed all that. Today your often-dreamed-of trip to Cambodia or Uganda or Bolivia or even Antarctica can so easily become realit...