The Arabs built a fountain near a water source, in the hamlet Alqamah. A strong earthquake, occurred at the end of the V century, damaged the fountain that was rebuilt some years later. When the residential area moved to the present location, around the castle, the fountain became an important referring point for the sheep farming (the major rural activity in Alcamo) and it was built a drinking trough.
On the front side, there are two washbasins and pilasters with capitals on the top. The drinking trough dates back to the first half of IX century and it is made of calcarenite and travertine.