Located higher than 4000m above sea level, Potosi once was the economic centre of Bolivia. It is known for its silver mines and while nobody knows how much silver has come out of these mines until today, legend says that you could build a bridge from South America to Spain with it and still have metal left.

Soon after the precious metal was found, the Spanish started mining in this area. First, they enslaved the indigenous population and forced them to work in the mines. When, due to horrible working conditions, the natives had died, they brought in slaves from Africa. Eventually, Bolivia got independence and slavery was abolished, but working conditions have not improved much. Eight million people have died in those mines until today.…