Día de los Muertos, or Day of the Dead, which happens this weekend, is celebrated in communities across the U.S. The primarily Mexican holiday is rooted in the belief that the veil between the mortal and immortal worlds thins, allowing deceased spirits to cross over to the living world to be with loved ones.   The holiday takes place over three days. Official celebrations usually begin on Nov. 1 and end on Nov. 2 and preparations and vigils start on Oct. 31, depending on where the holiday is being celebrated. Nov. 1 is known as Día de los Angelitos, which honors the souls of deceased children, and Nov. 2 is Día de los Muertos.   As part of the holiday, which is rooted in indigenous culture, families will create a trail of marigold petals from their front doors to their altars to help guide spirits home.   📸: Carl De Souza, Enrique Castro, Ulises Ruiz, Johan Ordonez, Marvin Recinos / AFP via Getty Images   Read more on the key elements of Día de los Muertos at the link in our bio. ...