Spain's human tower competition

Th red team competes at Tarraco Arena in Tarragona. The human towers, traditional throughout Catalonia, are recognized by the United Nations as an Intangible Cultural Heritage of Humanity.

Members of the "Castellers de Villafranca" human tower team jumps into the arms of a team member during the XXV human towers, or castells, competetion in Tarragona on October 35, 2014. These human towers, built traditionally in festivals within Catalonia, gather several teams that attempt to build and dismantle a tower structure. AFP PHOTO / JOSEP LAGOJOSEP LAGO/AFP/Getty Images ORG XMIT: - ORIG FILE ID: 534114618

TARRAGONA, SPAIN - OCTOBER 05: Members of the Colla 'Castellers de Vilafranca' start the construction of a human tower during the 25th Tarragona Castells Competition on October 5, 2014 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. (Photo by Alex Caparros/Getty Images) ORG XMIT: 516927809 ORIG FILE ID: 456686494

Members of the "Castellers de Villafranca" human tower team play "grallas" during the XXV human towers competetion in Tarragona on October 35, 2014. A grall is a double reed instrument part of the oboe woodwind family and is the traditional instrument used during the ascencion and descencion of human towers or castells. AFP PHOTO / JOSEP LAGOJOSEP LAGO/AFP/Getty Images ORG XMIT: - ORIG FILE ID: 534113807

The sun lights members of the "Xiquets de Tarragona" human tower team during the XXV human towers, or castells, competetion in Tarragona on October 35, 2014. These human towers, built traditionally in festivals within Catalonia, gather several teams tha attempt to build and dismantle a tower structure. AFP PHOTO / JOSEP LAGOJOSEP LAGO/AFP/Getty Images ORG XMIT: - ORIG FILE ID: 534115302

Members of a Castellers push to make a human tower during the 25th Human Tower Competition in Tarragona, Spain, on Sunday, Oct. 5, 2014. The tradition of building human towers or Ïcastells� dates back to the 18th century and takes place during festivals in Catalonia, where Ïcolles� or teams compete to build the tallest and most complicated towers. The structure of the Ïcastells� varies depending on their complexity. A Ïcastell� is considered completely successful when it is loaded and unloaded without falling apart. The highest Ïcastell� in history was a 10 floor structure with 3 people in each floor. In 2010 Ïcastells� were declared by UNESCO one of the Masterpieces of the Oral and Intangible Heritage of Humanity. (AP Photo/Emilio Morenatti) ORG XMIT: EM108

Members of the "Colla Vella Xiquets de Valls" human tower team form a "castell" during the XXV human towers, or castells, competetion in Tarragona on October 35, 2014. These human towers, built traditionally in festivals within Catalonia, gather several teams that attempt to build and dismantle a tower structure. AFP PHOTO / JOSEP LAGOJOSEP LAGO/AFP/Getty Images ORG XMIT: - ORIG FILE ID: 534114545

Members of the "Colla Vella Xiquets de Valls" human tower team form a "castell" during the XXV human towers, or castells, competetion in Tarragona on October 35, 2014. These human towers, built traditionally in festivals within Catalonia, gather several teams tha attempt to build and dismantle a tower structure. AFP PHOTO / JOSEP LAGOJOSEP LAGO/AFP/Getty Images ORG XMIT: - ORIG FILE ID: 534115970

Red cross personnel attend to an injured member of the "Xiquets de Tarragona" team during the XXV human towers, or castells, competetion in Tarragona on October 35, 2014. These human towers, built traditionally in festivals within Catalonia, gather several teams tha attempt to build and dismantle a tower structure. AFP PHOTO / JOSEP LAGOJOSEP LAGO/AFP/Getty Images ORG XMIT: - ORIG FILE ID: 534116082

TARRAGONA, SPAIN - OCTOBER 05: Members of the 'Colla Jove Xiquets de Tarragona' fall down during the construction of a human tower during the 25th Tarragona Castells Competition on October 5, 2014 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. (Photo by Alex Caparros/Getty Images) ORG XMIT: 516927809 ORIG FILE ID: 456690826