The "Leyenda de la Llorona" is a popular Mexican folktale about a woman named Maria who, after losing her children, wanders near rivers and lakes, crying for them. The story varies by region, but it often serves as a cautionary tale for children, warning them to stay away from water at night. In many versions, Maria is depicted as a tragic figure who experiences deep sorrow and regret. Her ghostly presence is said to haunt areas near water, and her cries can be heard echoing in the night. The legend reflects themes of loss, motherhood, and the consequences of one's actions.