Though I've been trying to do research, I am still confused about castellers. Is there a "season" when these events happen? I hope to be in Barcelona around the beginning of May. Will they be performing then? WHERE do they perform? Do they have specific locations or do they move? Does a group do it alone or is it always in connection with other groups? How long do these events last? Can they be found all over Spain or more in the Catalan area? As you can probably tell, I'm still quite confused about the whole experience. I'd love to see one if at all possible. Thanks for any help.