I had the impression, that would prevent people from travelling countries and working there without work visa.
The first thing that always crosses my mind when I see these feats of endurance - walking for weeks/months/years is always how the hang did they pay their way - food, accommodation (even if it's just a tent) clothing, medical supplies, none of it's free
https://duckduckgo.com/?t=ffab&q=visa+sponsorship+meaning&ia...
He doesn't. He walks some, marks where he stopped, takes a break, continues from where he left off.
Depends on what you mean by “unbroken”.
I’d assume that when he ran into legal issues like after crossing the Bering Strait the authorities would transport him via a car or bus so it’s not like he never took a motorized transport.