El Anciano Rey de los Vinos is an institution in Madrid spanning over 100 years old! And this was the best thing I ate at the Madrid Food Tour-- century-old tapas of glorious rabo del toro (bull's tail stew) encased in crunchy filo pastry, topped with pimento, drizzled with balsamic vinegar and gravy. We had it with a young tempranillo wine.. just perfect! (Trivia: It is said that in 1909, a tunnel was dug into the restaurant connecting it to the palace so that King Alfonso could have a drink here incognito!)
