UNESCO Heritage Sites Near Humberstone, Chile
The Humberstone and Santa Laura Saltpeter Works in Chile’s Atacama Desert, UNESCO-inscribed in 2005, are ghost towns left behind by the industry that once supplied global agriculture with nitrogen fertilizer and armed the world’s wars. At its peak around 1910, Humberstone had 3,700 residents, a theatre, and a hotel; its workers were paid in company tokens redeemable only at the company store. The invention of synthetic ammonia in Germany in 1913 made Chilean nitrate obsolete within a generation, ending the boom and leaving the Atacama’s 200-plus industrial plants to the desert.









