Torbjorn Pedersen, from Denmark, is trying to become the first person to travel the entire world only on buses, cars, trains and ships.
It is possible to fly pretty much anywhere in the world and get there within hours.
But one man is taking modern day travel to the extreme and doing what no one has done before.
He goes by the name “Thor” and is trying to visit every country, without setting foot in an aeroplane.
During his stop in Qatar, he spoke with Al Jazeera’s Leah Harding in Doha.