🇵🇪 Peru · Ancient city
Achil Complex
Late Intermediate 1100–1470 CE Chachapoya · Chachapoyas
Remote fortified town on Achil ridge between Utcubamba and Huabayacu tributaries of Marañón: 60 circular houses, watchtower 8 m diameter on ridge apex, and 150 m defensive wall with parapet.