In reality these make part of one long valley (wied) reaching a length of about 14.4 km (9 miles). Starting from Wied il-Qlejgha, it leads to Wied l-Isperanza which becomes Wied il-Ghasel, changing its name again to Wied Filep as it approaches Salina and the sea. The two best known sections are Wied l-Isperanza and Wied il-Ghasel. The former takes its name from the wayside chapel erected there in 1760, while the latter derives its name from the honey, which, according to a common belief, was so abundant in the past. According to folklore, the numerous bees used to produce so much honey in their hives situated in the cracks of the rocks that, at points, these over-spilled and honey trickled out all along this valley.

This valley in Mosta is quite picturesque and is still to be considered a relatively natural haven, given the consequences of modern development which spares nothing in the name of ‘progress’. There are three wayside chapels found along this length of the Mosta valley: San Pawl tal-Qlejgha (dedicated to the Shipwreck of St. Paul), Ta’ l-Isperanza, and San Pawl l-Eremita. There are also three bridges which cross the Mosta valley at different points. Each takes it name from the section it crosses, thus: pont (bridge) tal-Qlejgha, pont ta’ l-Isperanza and pont ta’ Wied il-Ghasel.

This valley hosts many species of flora, amongst which there are some of the endemic plants of Malta. During the rainy season there are pools and streams, supplied also from the runoff water from the Rabat plateau, which give this habitat the sounds and feelings of the presence of water. There is also a selection of trees and large shrubs including common species such as the Carob, Fig and Olive. Fauna is also very much present in this valley and it spans from the tadpole and frog to bees, beetles and wall lizard, amongst others. The valley in all its length is at its best in winter and spring, when water and nature are at their height to the benefit of the flora and fauna inhabiting this, Mosta’s most important natural habitat.