A picture for my bro who has the same desire -
Alastair Humphreys (One of National Geographic's Adventurers of the Year for 2012)

His journey around the world, through 60 countries. 5 continents. 4 years. 46,000 miles.

Sir Ranulph Fiennes described Alastair’s expedition as:
“…out of the ordinary. In today’s world of dashing up Everest in less than a day, sailing round the world in ten weeks, and best-selling books about three month motorbike rides, Alastair’s journey stands out as amazing. It was probably the first great adventure of the new Millennium. Alastair’s journey was an old-fashioned expedition: long, lonely, low-budget and spontaneous. It was a life on the road rather than a whirlwind break from home.”