I have always loved this drink but did not realize it originated in Spain.
One of the more delightful vacations I had was to Alboraya, Spain, on the outskirts of Valencia. I've always liked a Mexican horchata, but a proper Valencian horchata de chufa was truly sublime, having a nuttiness almost almond-like.
The place across the street (on Avenida de la Horchata, no less), Horchata Daniel, was a splendid horchateria. I could go over, sit back, and enjoy any number of horchata-based beverages (my favorite being the flotaor, blended frozen horchata with a scoop of ice cream on top), while looking at works of Dali (Salvador Dali was a regular there).
Alas, while I've found a handful of places in the US that use chufa for their horchata, it's still not the same. Surprising, since I was watching them make it at Daniel and the ingredients were literally nothing but chufa, water, and sugar.