This rooftop terrace just off Puerta del Sol is in one of Madrid's oldest, most exclusive clubs (the casino is a club for gentlemen, not gamblers; it's members only, but the restaurant is open to all). When it opened the food was inspired and overseen by celebrity chef Ferran Adriá, but as the years have gone by, chef Francisco Roncero has built a reputation of his own. Try any of the light and tasty mousses, foams, and liquid jellies, or indulge in the unique
tapas—experiments of flavor, texture, and temperature, such as the salmon ventresca in miso with radish ice cream or the spherified sea urchin. There's also a sampler menu.