🇵🇪 Peru · Hydraulic works
Qhapaq Ñan – Andean Road System
Inca Empire with antecedents Wari/Tiwanaku (~1000–1532 CE; Inca 1438–1532 CE) · Inca (with pre-Inca antecedents)
The backbone of Tawantinsuyu, Qhapaq Ñan runs 6,000 km along the Andean crest from Colombia to Chile, with east–west transversal roads totalling over 23,000 km.