It has been asked here, what if you are young and don't have a house to sell? Consider traveling by bicycle. I was able to do this when I was only 18. This is much cheaper and simpler. You'll become super fit and experience places in more detail. After the first 2 or 3 weeks the pedaling part is nothing.

Since the cycling trip I've done some motorcycle trips that lasted a few weeks, and I always felt the pinch of time and money. I started seriously thinking about how I could travel for a longer period of time while I'm still young.

Like so many others on this thread, my answer is related to real estate investment. Do not assume that this strategy is not right for you even if you are young. I scraped every penny to buy a house at age 25, and I too had travel on my mind from the start. Now 3 years later somehow the value of the house doubled. Buying a house may make you feel tied down for a while but then it can set you free. You might as well pay a mortgage rather than rent.

And I don't think you have to be bored meanwhile. I've gotten into so many hobbies during the last three years of home ownership and I know I will miss some of that when it comes time for the big adventure.

The funniest part about this is that you may look like the quintessential normal person… house, car, debt, trips to home improvement store, mowing the lawn, normal job… then one day you've got major cash in the bank and are riding off into the sunset. :-)