Enjoy the medieval history of several cultures in this tour of Spain!  Once you fly into Madrid, you can hop a flight down south and spend the next several days understanding several sets of history and culture and their overlap.  From the Romans to the Moors and the Christians fighting them, you'll discover how each group repurposed another's buildings and turned them into their own.  Walk the ancient hallways of Alhambra, tour the gardens of Alcazar, and common religious grounds like a mosque/cathedral.  Take in a flamenco performance, futbol game, or even a bullfight.  You can easily get back to Madrid, where you can hop a short flight to Barcelona or Pamplona (during the running of the bulls).  Each city holds its own unique beauty which will enrapture you for years to come.