🇵🇪 Peru · Archaeological wonder
Chankillo Archaeoastronomical Complex
Early Horizon–Early Intermediate 250–200 BCE (Initial Late Chavín to Wari interstice, Casma-Sechín tradition) · Casma–Sechín / Pampas ( north-central desert, precedent to Moche for Casma valley, not Inca)
Oldest solar observatory in Americas (250–200 BCE): 13 evenly spaced 2–5 m towers on 300 m ridge crest marking annual solar horizon from two enclosed observation pavilions (western fortress hill and…