It’s partly that bravery, and the evident care for one another the castellers display, that makes this such a beautiful and mesmerising sport. The colles are more like huge families than sports teams, and their camaraderie extends well beyond building human towers. They work together to raise money for their groups, they attend each other's weddings, they band together if one needs financial help, and, of course, they share beers after practice. For brilliant tips about what else to see and do in Spain, check out our pick of the best bits.