Humberstone and Santa Laura Saltpeter Works

Humberstone and Santa Laura Saltpeter Works are two former saltpeter refineries located in northern Chile. They were declared a UNESCO World Heritage Site in 2005, as a testament to the historical importance of saltpeter mining in Chile and the culture and social agenda that developed around it in the late 19th century. The works were placed on the World Heritage List in Danger that same year, due to the fragility of the derelict buildings, but was removed in 2019.

Humberstone and Santa Laura Saltpeter Works
UNESCO World Heritage Site
LocationIquique Province, Tarapacá Region, Chile
IncludesHumberstone, Chile 20°12′30″S 69°47′43″W
Santa Laura, Chile 20°12′40″S 69°48′45″W
CriteriaCultural: (ii), (iii), (iv)
Reference1178bis
Inscription2005 (29th Session)
Extensions2011
Endangered2005–2019
Area573.48 ha (1,417.1 acres)
Buffer zone12,055 ha (29,790 acres)
Coordinates20.209°S 69.805°W / -20.209; -69.805
Location of Humberstone and Santa Laura Saltpeter Works in Tarapacá Region
Humberstone and Santa Laura Saltpeter Works (Chile)
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