The city of Granada is all about the Alhambra also known as the Red Fortress
The building on the top of the hill is part of the Alhambra fortification called the Alcazabae

The ancient city walls which used to protect the city
Granada fell to the Catholics in 1492 which ended Muslim rule in Spain

View of a section of the Alhambra from the city below

The interior of the Granada Cathedral

A close up of the stained glass windows

A zoom shot of Cathedral as seen from the Alhambra Alcazabae area

The city of Granada as seen from the Alcazabae