This is Cerro Rico, the mountain that eats men, in Potosí was the prime source for silver in the Spanish Empire. It is still mined today by local cooperatives without any regulation and thus pretty much resembles a swiss cheese with a constant danger of collapsing. Also, mining techniques haven't changed much since the colonial era: drilling holes for dynamite, blasting, hammering the rubble to small pieces and pushing it out in small carts in teams of two to three miners. All this in unventilated, hot and badly reinforced tunnels at 4000 m elevation. Most miners start working in there early teens and many later die of silicosis, cave-ins or suffocate in the tunnels. Entering the mines with a local guide, an ex-miner, was definitely one of the most impressive parts of our trip! #cerrorico #potosi #bolivia #mining #travel #adventure #mine #geology #mountain #silver (at Potosí, Bolivia)