For the longest time, almost every house had them. Recently I've begun taking photos of them because they seem to be disappearing or falling into neglect.
Disney recently filed paperwork to copyright "The Day Of The Dead" so they could use it to market their new (still untitled) Pixar flick based on the Mexican The Day Of The Dead holiday.
Day of the Dead (Dia de los Muertos) focuses on the gathering of friends and family to pray for and remember those that have passed on ... and maybe have some lunch!