The Semana Grande is one of the most in Spain festivals. This festival is also known as Aste Nagusis and is celebrated for 9 days in August. Attending Semana Grande gives you a chance to be a part of several fairs, concerts, and theatre performances. This entertaining festival also sees firework competitions. A gaint statue of La Marijaia, the mascot of the Semana Grande is made to float down the river and is set on fire.