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In addition to the Gigante de Atacama, the world's largest geoglyph at 86 meters (282 feet) high, there are geoglyphs throughout El Norte Grande. The rock art at Cerros Pintados comprises the largest collection of geoglyphs in South America. More than 400 images adorn this hill in Reserva Nacional Pampa del Tamarugal. Figures representing birds, animals, people, and geometric patterns appear to dance along the hill. Farther north, the Tiliviche geoglyphs decorate a hill sitting not far from the modern-day marvel of the Pan-American Highway. These geoglyphs, most likely constructed between AD 1000 and 1400, during the Inca reign, depict a large caravan of llamas. All of these llamas are headed in the same direction—toward the sea—a testament, perhaps, to the geoglyphs' navigational use during the age when llama trains brought silver down to the coast in exchange for fish.