Earth-scraped celestial clock
On the lonely western slope of a hill named Cerro Unitas, a colossal figure lies etched into the earth. Known as the Atacama Giant, this anthropomorphic geoglyph measures 119 meters (390 feet) from its feet to the top of its radiating crown, making it the largest prehistoric depiction of a human in the world. The figure was created between 900 and 1450 CE by cultures that inhabited the region, such as those influenced by the Tiwanaku and later the Inca.
The artists made the Giant using an extractive technique. They scraped away the dark, oxidized surface crust of the desert floor to expose the lighter-colored soil underneath. This method is responsible for thousands of other geoglyphs found throughout the Atacama Desert, a region containing over 5,000 such ancient artworks. These figures range from geometric shapes and animals like llamas and birds to other human-like forms, often positioned along ancient caravan routes. The Giant is the most prominent of 21 figures on Cerro Unitas alone.
A guide for gods and caravans
Archaeologists suggest the Atacama Giant is a complex astronomical tool. The straight lines extending from the figure's square head and sides align with the setting of the moon. By observing which point on the head aligned with the moon, ancient people could track the changing seasons. This function was essential for predicting the annual rainy season in the driest non-polar desert on Earth.
The identity of the figure is being studied study. One interpretation is that it represents a shaman or "yatiri," a spiritual healer and seer. Another prominent theory connects it to an Andean deity known as Tunupa-Tarapacá. According to local legends, this creator god journeyed from Lake Titicaca to the Pacific Ocean, teaching humanity about agriculture. In this context, the Giant may have been a representation of this divine being, a landmark for llama caravans, and a celestial calendar all at once. The figure's construction and astronomical function show a sophisticated understanding of celestial mechanics by the pre-Columbian cultures of the Andes.