City of Potosí
By the sixteenth century, the city of Potosi was considered the largest industrial complex in the world. Silver was extracted with a fairly advanced mine within a couple of miles from downtown. Now the site has been declared a World Heritage Site by UNESCO in 1987, the area includes industrial monuments of the Cerro Rico, where silver was mined, which then led to Spain to finance wars and life the crown, the colonial city, the church of San Lorenzo, and some houses that remain from this period, of which the mitayo Quarter, where the workers lived. It is very impressive to visit the mines in Potosi because here you will see people still working as they did four centuries ago, working with little security, very difficult conditions and extremely high stress.