Adventure is a part of life and some say life itself is an adventure. Many people travel for having an adventure. There are different ways to have fun when you travel to some place, whether domestic or international and one way certainly is to have some kind of adventure. This may include outdoor activities like sports or even going to a place with some kind of an extreme climate and even traveling to some place with a lot of perils like a dangerous jungle.
What is mundane to one can be an adventure to another, and when it comes to traveling, there is no exception to this. Some may find cycling or driving along a very thin and dangerous mountainous road to be adventurous. Others may find that rather commonplace in comparison to surfing on the sea. Still others may consider only extreme adventure sports like bungee jumping and kayaking to be capable of generating the thrills.
It matters in a big way where you come from. If you come from a very small town, and have never really traveled to a big city, visiting a metropolis can be compared to the experience that someone from the city has when he travels to a small hilly town where one has to take risks daily to get things done.
So adventure does not have any fixed definition in this context. Traveling has become quite cheap. Thanks to the availability of cheap tickets, accommodations and travel offers someone with not too much money also can have the adventure of a lifetime by traveling to a place which has some unique experience in store for him.