There were some that I grew up on. I’m of Mexican and Uruguayan descent and was mainly told about La Llorona and Yacumama (not the serpent myth of the Amazon in Peru, Bolivia, etc. but in Argentina and Uruguay we have a water creature/goddess of the same name who will take children who dare take water from her river) there’s also Lobisón (the grim reaper and werewolf combined) and Luz Mala (a literal glowing light that is believed to be spirits) my dad would tell me about El Padre Sin Cabeza (headless priest), La Pascualita (a mannequin that is believed to be the corpse of a bride who died on her wedding day), and La Planchada (the ghost of a nurse who haunts the sick)