If you're looking for some mental stimulation, make a trip to Museo de Prehistoria. Whether it's history, culture or beliefs, you'll find lots of thought-provoking displays to keep you entertained here.
Need to know where Museo de Prehistoria is? It's in Barrio del Carmen, and entry fees apply. If you've got time to spare, check out Oceanografic Aquarium, Bioparc Valencia Zoo and Central Market as well. They won't take long to reach from the collection of historical artifacts.