Feria De Abril - The Fair of April
This festival or fair has taken place in Seville, Spain since April 1847. The fair covers around a kilometre of fun, food, and socializing. It includes an amusement park and more than 1000 booths or tents called "Casetas" that belong to respected Sevillanos family, businesses, clubs, and group of friends. Most of these Casetas are private with very few public ones, so if you know someone you might be lucky and get an inclined invitation.
Another fun aspect about Feria de Abril, is that visitors get to dress up in traditional "traje de gitana" Andalusian wear. Beautiful, Flamenco-style wear.