Above the southern shore of Lake Titicaca, at about 3,850 meters, the Tiwanaku ceremonial core still holds one of the Andes’ most photographed monoliths: the Gate of the Sun, carved from a single andesite slab and set today in the Kalasasaya courtyard. Frieze figures march across its lintel. Writers have long read those figures as a calendar—agricultural, solar, sometimes impossibly ancient. Ancient-astronaut captions borrow the same doorway for paleocontact lore. This Archive file stays contested.
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