Answer: Granada - The Alhambra is the red castle that sits on the hill above the city of Granada. It was built during the Nasrid dynasty and dates back to the 9th century. The Alhambra complex covers an area of 140,000m2 and used to be an entire city with baths, houses and churchs. It was established as a Royal residence in the 12th century with the King's court, palaces and military barracks and defensive towers, etc.