Ancient Astronaut theorists Giorgio Tsoukalos, David Childress, and William Henry converge on Peru to investigate whether recent discoveries at sites like Caral suggest extraterrestrial involvement in South American civilization. The episode challenges the conventional timeline that credits the Inca Empire (13th-16th century AD) with Peru's megalithic achievements at Cusco, Sacsayhuamán, Ollantaytambo, and Machu Picchu. The theorists argue that the dating of Caral—a pre-ceramic settlement on Peru's coast—has upended the accepted chronology, revealing advanced construction thousands of years before the Inca. They propose that structures featuring massive stone walls and precise engineering required help from beings from another world, pointing to local legends of giants and "children of the sun" as encoded memories of extraterrestrial contact.
Mainstream archaeology does attribute Caral to around 2600 BCE, making it one of the Americas' oldest known urban centers, though scholars credit sophisticated indigenous innovation rather than outside intervention. The Inca's relatively brief dominance (roughly 200 years before Spanish conquest in 1526) has long puzzled researchers given the scale of their building projects, and ongoing excavations continue revising our understanding of pre-Columbian Peru's deep history. For skeptics, the episode offers a window into legitimate archaeological mysteries about technological transfer between ancient Andean cultures and the genuine questions surrounding how isolated societies achieved such monumental construction feats in extreme terrains spanning desert, mountain, and jungle environments.
Caral-Supe
Peru · Andean Pre-Columbian
Theorists argue that Caral's layout mirrors the Pleiades star cluster, its pyramid construction parallels contemporaneous structures in Egypt and Mesopotamia, and its associated Staff God imagery links it to extraterrestrial visitors known as Viracocha. Mainstream archaeologists, led by Ruth Shady Solís, identify Caral as a sophisticated urban center dating to approximately 2600 BC, making it one of the oldest known civilizations in the Americas, built by indigenous peoples engaged in trade across coastal, highland, and Amazonian regions.
Cave Painting Site, Indonesia (44,000-year-old)
Indonesia · Southeast Asia
Theorists point to the 44,000-year-old Indonesian cave painting of a humanlike figure with a bird's head as the earliest evidence of the worldwide bird-man motif they associate with extraterrestrial visitors. Mainstream archaeologists identify this as the oldest known figurative cave art, created by early Homo sapiens in Sulawesi, Indonesia, depicting a narrative hunting scene with therianthropic figures.
Choquequirao
Peru · Inca
Ancient Aliens presents Choquequirao as a recently discovered 'lost city' in Peru that upends the historical timeline of South America, suggesting civilization emerged earlier than previously believed and may have involved extraterrestrial assistance.
Inca Trail
Peru · Inca
Ancient Aliens suggests the Inca Trail's precise engineering and alignment with astronomical events indicate possible extraterrestrial influence on Inca construction techniques. The path's sophisticated route planning is presented as evidence of advanced knowledge.
Lost City of Peru (Cahuas ruins)
Peru · Pre-Inca
Ancient Aliens presents a recently discovered lost city in Peru as evidence that civilization emerged thousands of years earlier than previously thought. The discovery is framed as potentially indicating extraterrestrial influence in the development of South American civilizations.
Machu Picchu
Peru · Inca
Precision stonework without mortar suggests alien construction techniques
Sacsayhuaman
Peru · Inca
Massive zigzag walls with stones weighing up to 200 tons fitted with impossible precision
Tomb Complex of the Hongwu Emperor (Ming Xiaoling Mausoleum)
China · Chinese
Theorists cite the Ming Xiaoling Mausoleum's layout as mirroring the Pleiades, adding it to a worldwide list of ancient sites they claim were designed by or in tribute to extraterrestrial visitors from the Pleiades star system. Mainstream historians attribute the mausoleum's layout to Chinese geomantic (feng shui) principles and imperial tradition of the early Ming Dynasty.
Vilcabamba
Peru · Inca
Ancient Aliens suggests Vilcabamba, the last Inca stronghold, demonstrates advanced Inca engineering and architectural knowledge that may have extraterrestrial origins. The site's hidden location and sophisticated construction are highlighted.