Aste Nagusia is the main festival of Bilbao, held annually in August. It lasts for nine days and celebrates the city's culture, history, and traditions. The festival features a variety of events, including concerts, parades, and traditional Basque activities, attracting both locals and tourists. One of the highlights of Aste Nagusia is the opening ceremony, where the Marijaia figure, symbolizing the festival, is unveiled. Throughout the week, visitors can enjoy street performances, food stalls, and fireworks, creating a vibrant atmosphere that showcases the spirit of Basque Country.