Leading teams compete against each other for the first place in different categories where towers are scored on difficulty.
Building human towers, or castells, is an old Catalan tradition dating back over two hundred years.
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.
Picture credit:Daily Mail,MSNBC,Tarragona Blog
