Catalan castellers build human towers through physical precision

The Catalan tradition of 'castells', or human towers, relies on a precise physical architecture where participants are assigned roles based on their size, strength, weight, and agility. The structure typically consists of the 'pinya' (the base used for stability and cushioning), the 'tronc' (the central columns), and the 'pom de dalt' (the top section occupied by the youngest members). The 'enxaneta', a child at the very summit, signals the successful completion of the tower by raising a hand.

Recognized as part of the Intangible Cultural Heritage of Humanity by UNESCO since 2010, the practice has expanded globally. While rooted in Catalonia, 'colles' (teams) now exist in international cities including Madrid, Paris, Boston, Sydney, Stockholm, and Berlin.