Went there last year. Great place to visit but probably more dangerous than any working or abandoned mine that I have been in. Dusty, hot (40 centigrade plus), high altitude (4000m), dodgy crawls under rocks and free climbs down winzes. But worthwhile to see the miners almost working in C19th conditions. For some photos see the Cerro Rico album [photo]Cerro-Rico-Silver-Mine-User-Album-Image-86422[/photo]