abandoned humberstone and santa laura saltpeter works factory, near iquique, northern chile, south america

abandoned architecture atacama atacamadesert attraction building chile collapse communal community crumbly cultural culture derelict desert desolate destination economic factory fertilizer ghosttown heritage history humberstone industrial industry iquique landscape laura machinery machines monument nitrate old plant production rusty saltpeter santa santalaura sodium steampunk street tourism tourist town travel unesco wild works