Thousands gathered in Tarragona as 12 of Catalonia's leading teams competed to build towering human structures in the 30th edition of the event. Known as 'castells', the tradition sees teams work together to create increasingly tall towers, with children climbing to the very top as spectators cheer them on. The centuries-old Catalan tradition was added to UNESCO's Intangible Cultural Heritage list in 2010 and remains a major part of the region's cultural identity. #catalonia #news #viral #humantower #spain