The Ġgantija temples are located at the end of the Xagħra plateau.
The Ġgantija temples are the earliest of the Megalithic Temples of Malta and are older than the pyramids of Egypt (built between 3600 and 3200 B.C.)
The name Ġgantija derives from the word ‘ggant’, Maltese for giant.
Gozitans believe that the temples were built by a race of giants.
More info at wikipedia.