We went to the Cathedral to visit the inside.
(Free admission before noon; otherwise €6).

Inside the Cathedral.

We saw the curved-roof of the Santa Caterina market,
so we walked there.
(Have I mentioned that a block in the old town is very short?)

The inside of the market was very clean, it's what a modernized Boqueria market would look like.
Unfortunately, this market was not as bustling as the Boqueria market.

seafood vendor in the market. 

Another seafood vendor in the market. 

Some tropical fruits.

The street where Palau de la Musica Catalana (Palace of Catalan Music) is located.
The extravagant concert hall is located on a cramped street.
Completed in 1908, it was designed by modernistic architect Lluís Domčnech i Montaner.
The red brick 6-story building in the center is a 1989 addition to house the dressing rooms and library.

The square where the concert hall is is named after Catalan composer Lluís Millet.

The facade of Palau de la Musica Catalana is made in red brick and decorated with mosaics.

Carvings and sculptures decorated the facade.

Mosaic details on the facade.

The cafe of the concert hall.

A peek at the front entrance vestibule and marble staircase.

The entrance vestibule.
One may book a timed-ticket to go on a guided tour, but we did not.

Back to Placa Catalunya to board a sightseeing bus for the blue route
to the northern suburb and many Gaudi sights.

Driving past the Sagrada Familia church.

Prior to reaching this point, we drove past the stop to walk to Park Guell,
Gaudi and Mr. Guell's failed housing project for the wealthy Barcelonan.

A stop at Camp Nou, home of Barcelona's football team.

Through the fence, we could see
a marketplace with shops, restaurants and visitors buying souvenirs.

After disembarkation, we walked to Ceveseria Catalana for tapas.
These are grilled razor clam, seafood Paella, and patatas bravas.
(Before devouring a razor clam, you need to surgically remove a pocket that holds all the sand.)

And grilled red shrimps, as well as grilled cod fish on a stick.

In the evening we strolled to Placa Catalunya to take a few more pictures.

The huge building boardering one side of the plaza is El Corte Ingles department store.