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TARRAGONA, SPAIN - OCTOBER 02: Members of Tarragona's team make the tower during the Spain's traditional human towers competition "Concurs de Castells" at Tarraco Arena in Tarragona, Spain on October 02, 2016.  (Photo by Albert Llop/Anadolu Agency/Getty Images)
TARRAGONA, SPAIN - OCTOBER 02: Members of Tarragona's team make the tower during the Spain's traditional human towers competition "Concurs de Castells" at Tarraco Arena in Tarragona, Spain on October 02, 2016.  (Photo by Albert Llop/Anadolu Agency/Getty Images)

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    Spain's mesmerizing tradition of building human towers

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Spain's mesmerizing tradition of building human towers

Every fall people flock to the Catalonia region of Spain to see the centuries old tradition of building human towers.

Spain's mesmerizing tradition of building human towers

Every fall people flock to the Catalonia region of Spain to see the centuries old tradition of building human towers.