If you get the chance, pay a visit to the Alhambra, a beautiful palace set in the hills in Granada Spain.
The Alhambra was a real walled city built by the Nasrid Kings, in the last period of Muslim rule in Spain.
You could spend a lifetime painting scenes of the many entrances and secluded courtyards set within the palace, as well as unending views and sections set within the palace walls.
I was struck by this view of the Lindaraja Courtyard depicted in the painting and, this courtyard alone could have made me work for at least a dozen or more paintings.