Hundreds make amazing human towers

Members of the Colla 'Caprogossos de Mataro' climb up as they construct a human tower during the 24th Tarragona Castells competition on Oct. 7, 2012, in Tarragona, Spain. The 'Castellers' who build the human towers with precise techniques compete in groups, known as 'colles', at local festivals with aim to build the highest and most complex human tower. The Catalan tradition is believed to have originated from human towers built at the end of the 18th century by dance groups and is part of the Catalan culture.

Members of the Colla 'Castellers de Vilafranca' climb up as they construct a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

A young member of the Colla 'Vila de Gracia' climbs up as they construct a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Caprogossos de Mataro' climb up as they construct a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Castellers de Vilafranca' climb up as they construct a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Castellers de Vilafranca' start a construction of a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Vella de Valls' climb up as they construct a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Vella de Valls' celebrate after building a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Castellers de Vilafranca' climb up as they construct a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Castellers de Lleida' climb up as they construct a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Jove de Valls' celebrate after building a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Vella de Valls' start a construction of a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

A member of the Colla 'Capgrossos de Mataro' ties a headscarf roung their wrist during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Jove de Tarragona' start a construction of a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

A young member of the Colla 'Vella de Valls' descends after bulding a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

A Catalan Pro-Independence flag is held up by members of a colla as the sing the Catalan National Anthem during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Capgrossos de Mataro' start a construction of a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

A member of the Colla 'Xiquets de Tarragona' looks on before building a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

A member of the Colla 'Capgrossos de Mataro' ties a headscarf roung their wrist during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

A member of the Colla 'Castellers de Lleida' prepares during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

A Catalan Pro-Independence flag is held up by members of a colla as the sing the Catalan National Anthem during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.

Members of the Colla 'Castellers de Vilafranca' climb up as they construct a human tower during the 24th Tarragona Castells Competition on Oct. 7, 2012, in Tarragona, Spain.