Barcelona has a fantastic stock of buildings that cover most of the modern eras.
Just ordinary apartment buildings are quite decorative and distinct from each other,
The older neighborhoods close to the waterfront are narrower and maze like.
Some restaurant courtyards
One of the more fantastic buildings is the Palau de la Música Catalana-designed by Lluís Domènech I Montaner and finished in 1908.
I could not gain access to the auditorium so had to use these images of the stage courtesy of wikipedia