OK, so this isn't really weaving-related but I thought it was worth a look. I never realized the during Holy Week (Semana Santa) the Alfombras were created specifically for the occasion and are assembled by individuals of collected plant materials.
The article comes from here: http://kidworldcitizen.org/2012/04/06/photos-of-guatemalan-alfombras-street-decorations-for-holy-week/