Offbeat Traveler: Tarragona, Spain human tower competition
Building human towers, or castells, is an old Catalan tradition dating back over two hundred years. Each castell (a Catalan word for castle) is built by a team, called a colla, consisting of between 75 to 500 men and women. Young and light members form the top of a tower while heavier members form the base. Music plays as a team erects its tower, usually between six and ten levels high.