If you're a regular reader of this blog, you'll know that I like trains. So when I come across a video titled "This Sahara Railway Is One of the Most Extreme in the World," there's a high probably that I'm going to watch it — even if it's over 6 years old. Now for a second, I thought that I may have already written about this rail line, but AI tells me that I haven't.

The Mauritania Railway is one of the most iconic and famous lines in the world. It's approximately 704 kilometers long and it was built for the sole purpose of transporting iron ore from the Zouérat mines in northern Mauritania to the port city of Nouadhibou on the Atlantic coast. Iron ore represents somewhere around half of Mauritania's exports.

This railway runs some of the longest trains in the world — each train can have over 200 cars, which translates into trains that are up to 3 kilometers long. They can also transport up to 17,000 tons of iron ore, making it one of the heaviest trains anywhere in the world.

But what I find most fascinating about this railway is the informal economy that unintentionally emerged on top of it. Because the trains return from Nouadhibou to Zouérat empty, local fishermen and traders use it to transport product inland to towns along the line. And for many of these towns, this is their lifeline — it's their only connection to the outside world.

It's not a fun trip, nor is it a safe trip. It also takes 20 hours to travel from one end to the other. But it's importantly free and it provides economic opportunity. It's an extreme example of the power of rail. Here you have a single railway that likely shoulders at least a quarter of the country's entire GDP, and that's without including any of the benefits derived from its informal contributions.

If you haven't yet seen the above video, I would encourage you to take the 12 minutes and give it a watch. The visuals are important to see. And there's a reason it has over 10 million views.

Cover photo by Andrzej Kryszpiniuk on Unsplash