Indeed, it is quite a mystery. Elefsina (Eleusis), this most industrial area of Attica, was once the site of one of the largest ceremonies of mystical initiation of the ancient world, the Eleusinian Mysteries.
Eleusis is the ancient sacred town of Attica notorious for the cult of Demeter, goddess of the harvest, as well as the popular Eleusinian Mysteries (a hope for life after death).