Humberstone Saltpeter Works, UNESCO World Heritage Site, northern Atacama, Chile, South America

humberstone saltpeter works chile atacama northern desert locomotive train rusty abandoned derelict building factory industrial machinery relic past history unesco world heritage site landscape sky blue arid weathered remnant era industry region ghost town mining mining town extraction chilean south america travel history buff architecture industrial design abandoned buildings abandoned places ghost city train tracks locomotive engine old train historic site forgotten place industrial revolution