Giant steps : an American odyssey from Punta Arenas to the edge of Alaska

In Punta Arenas, Chile, in November 1998, Karl Bushby set out on one of the most remarkable journeys of modern times.

His plan is as simple as it is extraordinary: to walk up the Americas, across the Bering Straits, through Asia, Russia and Europe, back through the Channel Tunnel and returning to Britain in 2009.

It is a journey of remarkable endurance -- 20 miles a day, 3,000 miles a year, 36,000 miles in total.

By the the time Karl returns, he will have crossed four continents, twenty five countries, a frozen sea, six deserts and seven mountain ranges.

But more than that, unlike other similar expeditions, Karl is attempting it single handed: no huge support teams, no large sponsorship deals, this is the inspiring true story of a man facing remarkable odds -- and winning.