To the people saying it's too expensive for most people to travel: you can work and travel simultaneously. Lots of hostels offer room and board in exchange for working there, others pay cash. You can work as a club promoter or a laborer or as a freelance programmer, since this is HN, abroad. I have met people that have been on the road for over 5 years continuously; I assure you they didn't start out with any significant savings.