🇵🇪 Peru · Temple complex
Chanquillo — Solar Observatory Fortified Temple Chankillo
Late Chavín to Sechin Casma (350–200 BCE) fortress and 13-tower ridge 200 BCE (Ghezzi UNESCO 2021) · Sechin / Casma Late Chavín solar observatory state
Chankillo UNESCO 2021 Ghezzi 2001 fortress with solar riddle.