A colossal cargo train in northwest Africa is one of the heaviest in the world and is so long you can barely make out the wagons at the back as it zooms past.
Mauritania’s desert train, also known as the iron ore train, was created back in 1963 and transports through the Sahara desert as much as 84 tonnes of the valuable mineral substance in each of its 200 wagons.
The 700 kilometre-route…
