Castellers from Spain forming a human tower, or castell, in Sentosa yesterday. The 290 castellers from the Minyons de Terrassa, here as part of Catalan Week, climbed deftly on each other's shoulders, reaching a height of 12.5m. The Catalan tradition, dating back to the 18th century, was classified by Unesco as an Intangible Heritage of Humanity in 2010. The group will perform again this evening at Customs House Terrace.