Euronews video leads you through the impressive sights of the 26th annual Human Tower Competition in Tarragona in the Spanish autonomous region of Catalonia. People are competing to build the tallest and most structurally-complex towers (castells). The tradition of the competition dates back to the 18th century. This year's winner was the green team (Castellers de Vilafranca), they won eight times in a row. To explore the 360° video use your mouse or swipe around the screen.