Potosi is the most famous city in Bolivia for silver and tin mining, Cerro Rico which means rich hill has been used to extract silver for over four hundred years and is still mined today, the conditions are terrible for the workers and silicosis is very coomon, many of the miners are underage and die in accidents, they worship El Tio - the God of the underworld who is said to have an appetite for destruction and needs to be appeased with coca, alcohol and tobacco to keep the miners safe