tour of Spain

My father is willing to take a tour of Spain and willing to explore the major places there so I am damn sure his trip will gonna be best if he will explore these places:
Park Güell
Alhambra
Casa Batlló
Casa Milà
Royal Alcázar of Seville
La Sagrada Familia
What do you say regarding these sights?


I will take tour to niagara falls from new york .

I am so sure that this will be really having such a good and most appealing time as it. I am gonna spend out the time as it.