It was a monumental feat of engineering, employing 18,000 men over an astonishingly short eight months, in some of the most inhospitable terrain the world has to offer.

There are more than a dozen memorials to those who have perished along the way.

The Lysebotn Road tests man and machine, tightening in places before rising to a series of plateaus with the road reaching out as far as the eye can see and gentle kinks littered between bursts of straight.