Human Towers, known as castells, are a traditional Catalan activity where groups of people form tall, human structures. This practice originated in Catalonia, Spain, and involves teamwork, balance, and strength. Participants, called castellers, work together to build these towers, often reaching impressive heights. The construction of castells is typically performed during festivals and celebrations. Safety is a priority, with a designated "base" supporting the structure and a "top" or "anxaneta" who raises a hand to signal completion. The activity fosters community spirit and showcases cultural heritage, making it a significant part of Catalan identity.