US First Lady Michelle Obama and her nine-year-old daughter Sasha on Thursday visited Granada, the former seat of Moorish rule in Spain, during the second day of her holiday in the country. The tour of the city ended with a tour at sunset of the Alhambra fortress-palace, Spain's most-visited tourist attraction. The Alhambra is now one of the world's largest open-air museums of Islamic architecture and a World Heritage Site. Here are some facts about Granada: __