These sunken ships left a large number of Roman amphorae on the seabed in the mouth of the bay.
The Xlendi Tower guarding the mouth of the bay was built by the Grandmaster Juan de Lascaris-Castellar on 29 June 1650.
It had, until recently, been abandoned with substantial damage caused to the outer walls of the tower.
It is said that there was a small community in the area of this chapel; 'Vizitazzjoni ta' Forn il-Gir' was not much visited by people.
Every year, on the first Sunday of September, a feast dedicated to the patron saint is held.
In the Afternoon, water games are held at the bay with the traditional 'gostra', a greasy pole which the players have to walk on to catch a flag.
In the evening a procession with the statue of Our Lady of Mount Carmel is held around Xlendi.
This chamber was divided into three floors and housed the storage, grinding and milling equipment.
During the British rule, Xlendi's bay was sandy, but with the passage of time, water from the valley and human interference, it is now pebbly.
So Xlendi Valley collects almost all the rain that falls on the adjacent villages of Kerċem, Munxar and Fontana.
This also causes flooding in the buildings on the main road from where the valley water passes.
The Tower of Xlendi was reached by a bridge built by the Knights of Saint John over the Kantra Valley.
The undeveloped area around Xlendi is home for a lot of flora and fauna species, some of them rare.
The 3 km stretch of cliffed coastline from Xlendi Bay westwards to Wardija Point forms the Xlendi Bay to Wardija Point Cliffs Important Bird Area, identified as such by BirdLife International because of its importance for two species of breeding shearwaters.