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Photo: rewbs.soal, CC BY-SA 2.0 via Wikimedia Commons
This UNESCO site is an old residential and production site from the days of the saltpetre era. Few residential houses are furnished, but most of the site is still in remarkable condition due to the dry atmosphere. Allow 1-2 hr to stroll around the huge area.
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 were removed in 2019 following significant restoration and conservation work.
© OpenStreetMap contributors
The Tarapacá Giant
The largest geoglyph in the region. A remarkable planning effort considering that it is hundreds of years old. You get the best overall picture when looking on Google Earth though; therefore you could stop there if you are driving along these roads any way but it's doubtful whether it really pays to come here from a long distance.