The Dictionary of the Spanish Language explains that a geoglyph is a “large figure on slopes or in wide plains, carved directly into the ground or made with stones, especially by prehistoric peoples.” Of all those located worldwide, the most famous are the Nazca lines (Peru), which have been declared a UNESCO World Heritage Site. They are visible only from surrounding mountains or from the air, which gives them an aura of mystery. Now, a group of researchers from Argentina and Spain will study a structure that could be a geoglyph discovered last year at about 3,000 meters above sea level in the Tigre mountain range (Argentina) and which was found by mountaineer Carlos Gobbi while consulting Google Earth. A joint expedition will attempt to examine it in situ in December.

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