Final answer:
The fairy-tale castle perched high above the city of Granada was the Alhambra, a medieval palace complex known for its beauty and historical significance. It was built by the Nasrid Dynasty, the last Muslims to rule in Spain.
Step-by-step explanation:
The fairy-tale castle perched high above the city of Granada was the Alhambra. The Alhambra is a medieval palace complex in Granada, Spain that was built by the Nasrid Dynasty, the last Muslims to rule in Spain. It is known for its sophisticated planning, complex decorative programs, enchanting gardens, and fountains. The Alhambra's most celebrated structures are the three original royal palaces: the Comares Palace, the Palace of the Lions, and the Partal Palace. The Alhambra is highly admired for its beauty, detail, and historical significance.