"Gonabad subterranean Ghasbe" as one of the amazing human-made phenomena historically attracted the attention of many historians and researchers have. The aqueduct of the Middle Land "Kuye Sharghi Gonabad" from the local known as the "Tower Ali Zamen" in fine-grained sediments started and connected to each of the seven channels is formed.
According to the latest studies during this subterranean 33113 meters and the number of wells that are more than 470 ring and depth of mother well approximately 280 to 300 meters. Now the discharge of this "subterranean" is 150 liters per second.

Ghasbe subterranean canal
Ghasbe subterranean canal
Ghasbe subterranean canal
Ghasbe subterranean canal