• Soak in Some Jazz - For a true old-school jazz club experience, you'll be hard-pressed to beat Scat Jazz Lounge.
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A number of radioactive isotopes are used for this purpose, and depending on the rate of decay, are used for dating different geological periods.
More slowly decaying isotopes are useful for longer periods of time, but less accurate in absolute years.
Readers will especially love the hundreds of color photos showing everything from the city's famous plazas to a pitcher of sangria; the street-by-street illustrated city walks (Old Madrid, which takes in the Puerta del Sol and Plaza Mayer, looks especially enchanting); the room-by-room explanations of the Palacio Real and Prado Museum; and, of course, the best places for tapas (Taberna del Foro is one).