Qanats can date back 3,000 years, but can be really tricky to find, especially in politically volatile countries.
Source : Cold War Spy Photos Reveal Ancient Subterranean Aqueducts
Qanats can date back 3,000 years, but can be really tricky to find, especially in politically volatile countries.
Source : Cold War Spy Photos Reveal Ancient Subterranean Aqueducts
