La Esperanza, Jujuy

[1] It hosts an historical sugar factory, founded by British industrialists Walter (1858–1944) and William Leach (1851–1932).

In 1906, German anthropologist Robert Lehmann-Nitsche signed an agreement with the Leach brothers.

Lehmann-Nitsche recorded their songs in 30 phonograph cylinders that he sent to the Berliner Phonogramm-Archiv.

[2] Lehmann-Nitsche was later criticized for having conducted his research ignoring the exploitation and mistreatment of the native Argentinians who worked in the factory.

[3] In 2019, after twenty years of difficulties, the factory, which was administered by the government since 2015, was sold to an alliance of private groups.