Experience Valencia culture where most of the locals come to shop for food. Held in an aging "modernist" building, the goods for sale include fresh produce, meat, and of course Spanish olives. Take a [car hire Valencia] so you can feel free to load up on the good stuff.
If you can't be in Valencia at the time of the festival you can still enjoy its concept by visiting either the Museo Fallero or Museo de Artistas Falleros. The origin of the Fallas Festivity goes back to an old tradition of the city's carpenters; Fallas used to be piles of combustible materials the carpenters burnt in the streets the night before the day of San José. Today the festivities have become a huge ordeal, involving floats and flowers, fireworks, and all night parties.
Where a great river once flowed through Valencia there is now a park. Spanning several neighborhoods all the way to City of Arts and Sciences it encompasses soccer and rugby fields, an artificial boating lake, athletics track, playgrounds, fountains, and excellent hiking and biking trails. Spend an afternoon here and get a little exercise in the sun. Come in a [rental car in Valencia] and enjoy it all.