Also known as the Fishermen’s Citadel, part of Alies has sunk underwater. The walls were 186 meters long and 2.5 meters wide, reinforced with circular and square towers. The foundations of these walls and towers are from porous rock, while the top part is made with river stones, bricks and tiles. There was also a religious centre inside the citadel, with an altar from the 4th century BC and ruins from the 5th and 6th. Evidence of workshops and residences can also be seen at the site.