The Goliath Expedition is Bushby's attempt to walk around the world "with unbroken footsteps", from Punta Arenas, Chile, to his home in Hull, England. He began his journey on November 1, 1998 and originally expected to finish the over-36,000+ miles (58,000+ km) trek in 12 years, though there were questions about the three gaps that created uncertainty. The first gap would be the Darien Gap between Colombia and Panama. The second, and most uncertain time wise, was the Bering Strait between the US and Russia. The third gap is the Channel tunnel between France and the UK. The journey was defined by two rules:
Karl will advance unassisted by any form of transport.
Karl will only return home on foot.