Fdérik (formerly Fort-Gouraud) is an administrative center in the Tiris Zemmour region in north-central Mauritania. Established in 1984, it is an important base for mining activity in the area and at nearby Mount Ijill. Iron ore is transported from Fdérik on the Mauritania Railway to the Atlantic port of Nouadhibou from where it is shipped to its destination.

The Mauritania Railway is a single rail line that spans 670 km. The train that carries the iron ore can have a chain of wagons up to three kilometers long.

Image: Mauritania Travel Diaries http://mauritaniatraveldiaries.wordpress.com/2006/09/05/iron-ore-train-from-nouadhibou-choum-to-fderik-and-zouerat-biggest-train-in-the-world-mauritania/

Reference : Wikipedia http://en.wikipedia.org/wiki/Mauritania_Railway