Firenze jee, like the espanola senorita says, any time is good to visit Spain! I would recommend the south of Spain...Al Andalus is my favourite part of Spain, and it has the most beautiful architecture!
Sevilla - where there is the beautiful Alcazar palace, built by the Almohads and King Pedro's residence.
Granada - where you will find the beautiful Alhambra palace... breathtaking...
Córdoba - The great mosque(formally visigothic church) of Córdoba, where the Nasrid kings also resided..
I love Spanish history.. Viva La Espana! :)
I am so looking forward to seeing all this in sept inshAllah.
Maroush if you get the chance...maybe you can start a thread dedicated just to southern spain and tell us all about your excursion? what hotels to stay in..what to see etc? thanks