Watermills of Shushtar In the Southern part of Gargar bridge or the bridge of Darvazeh (portal) and on a big rock, the waterfalls area- the watermills - of Shushtar is situated. There had been 32 mills on the both sides of the river but many of them had been ruined and only one or two of them has remained. Shustar is in the southern part of the Khozestan province and 95 Kilometers away from Ahwaz. The districts, allays, buildings and houses of this city are signs of antiquity of this city. Some of the ancient remains of Shushtar are structures like: bridges, dams, waterfalls, and water mills