Valencia, Spain is definitely improving in its efforts to accommodate vegetarians (vegetarianos/as), vegans (veganos/as), and celiacs (celiacos/as) or those who choose a gluten-free diet (sin gluten).
It seems that every time we go out we are lucky enough to discover new places with vegan and gluten-free options. When traveling or living in Spain, be very cautious when ordering. Many spaniards have a different view of vegetarian and vegan than in other parts of the world and often assume that you will still eat seafood, cheese, and/or eggs. It is typical to find tuna (atún) on most vegetarian sandwiches and salads. In my experience, it is best to list all of the ingredients you DO NOT want in your meal.