🇮🇷 Iran · Hydraulic works
Qanat-e Zarch – Longest Qanat in Iran
Achaemenid to present (2,500 years continuous) · Persian qanat engineers (Achaemenid, Sassanian, Safavid)
71-km Zarch qanat—longest gravity aquifer tunnel on Earth (500 BCE–Safavid).
🇵🇪 Peru · Hydraulic works
Nazca Puquios Aqueducts
Nasca culture, Early Intermediate (~500 BCE – 600 CE; puquios ~300–600 CE) · Nasca (Nazca)
Unique Andean hydraulic analog to Persian qanats: 36 puquios, each a stone-lined infiltration gallery tapping sub-river gravel aquifers, ventilated by corkscrew stone spirals descending to the…