La Llorona is a character from popular Latin American legend, which has many variations depending on the place where count, although the original is very likely to be Mexican. The common point of all is the woman who goes mad after killing or see die to one or more of their children, and is wandering the roads as a soul in pain (after his death) or the banks of the rivers (if your children die drowned) scaring with its crying travellers that cross it while she continues looking for their children.