Horchata is a fantastic drink. I recall my first taste at a small Mexican/Yucatan restaurants in the Mission district of San Francisco (http://eatlikeushi.posthaven.com/poc-chuc-san-francisco-10-2011). Since then I've taken many opportunities from any restaurant, usually Mexican or Latin American and the one Melbourne cafe. The drinks seem to be a creation of rice, milk and cinnamon into a really lovely refreshing blend.
It was with great interest that Valencia was one of the originators of horchata, and it had a very strong presence around town from shops to restaurants, street stalls and even a few at Ciudad de las Artes y Ciencias by the watersides.
What's different in Valencia is that they are made from tigernuts and so referred locally as horchata de chufa. The best shop in town is reputedly Horchateria de Santa Catalina and very convenient when passing through to the large Placa de la Reina.
The horchata is refreshing and sweet without any hint of sickliness or syrup. The drink didn't last long.