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ZAPOTITLAN, MEXICO - AUGUST 12: Juan Diego Hernández Cortes, a partner of the salt mine, explains to a group of tourists how the terraces and evaporation piles are built as well as the salt extraction process and the type of organisms that inhabit the water such as saline brine shrimp and larvae of mosquito, during a day with workers of the salt mines on August 12, 2021 in Zapotitlan, Mexico. The area known as the Tehuacan-Cuicatlan biosphere reserve is considered as a World Heritage Place by UNESCO, according to the archeological evidence, people has worked with salt for over 2,000 years extracting water from springs and wells to be later evaporated on stepped terraces to be transformed in salt cristals. (Footage by Alfredo Martinez/Getty Images)