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

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

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

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

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

Ballet dancers watch a classmate as they practice for a competition between ballet schools at the National Superior Ballet School in Lima, Peru on Aug. 28. Nearly 100 girls and boys from Colombia, Venezuela, Chile, France and Peru are submitting themselves to a week-long competition hoping to win medals from Peru's national ballet school, and perhaps a grant to study in Miami.

A young ballet dancer warms-up before performing in a competition between ballet schools at the National Museum in Lima, Peru on Sept. 3.

Ballet dancers prepare backstage for a competition between ballet schools at the National Museum in Lima, Peru on Sept. 3.

A dancer from Venezuela's Nueva Era del Ballet school practices in the lobby of the National Museum for a competition between ballet schools in Lima, Peru on Sept. 3.

Ballet dancers practice for a competition between ballet schools on the stage at the National Museum in Lima, Peru on Sept. 3.

Ballet dancers from Venezuela's Nueva Era del Ballet school sit in the National Museum as they watch others practice for a competition between ballet schools in Lima, Peru on Sept. 3.

Husky dogs wait for preparations to get underway for the 28th annual Aviemore Husky Sled Dog Rally on January 20, 2011 in Aviemore, Scotland.

Last year's six dog champion Pete Jones prepares for the 28th annual Aviemore Husky Sled Dog Rally beside Loch Morlich on January 20, 2011 in Aviemore, Scotland.

A husky dog waits for preparations to get underway for the 28th annual Aviemore Husky Sled Dog Rally on January 20, 2011 in Aviemore, Scotland.

A sculpted ice bike rests on a plinth in Canada Square Park in Canary Wharf on January 13, 2011 in London, England.

Sculptor Krisztian Pogany works on an ice bike in Canada Square Park in Canary Wharf on January 13, 2011 in London, England.

Sculptor Krisztian Pogany puts the finishing touches to an ice bike in Canada Square Park in Canary Wharf on January 13, 2011 in London, England.

Medical personnel check the physical conditions of Chen Kecai during a cold endurance competition against Jin Songhao, right, on the Tianmen Mountain in Zhangjiajie, Hubei province, Jan. 3. Chen and Jin competed by staying in a glass container filled with ice wearing only a pair of shorts. Jin won the competition with 120 minutes in the container, which outscored Chen's 118 minutes. Chen set the Guinness record for the longest time spent in direct full body contact with ice on March 14, 2010 with 1 hour 48 minutes 21 seconds, local media reported.