Barcelona is a city in Catalonia, Spain and it has plenty of attractions, shopping centers, restaurants and museums to see.
I will make a brief list of what you should not miss if you visit Barcelona:

• Templo Sagrada Familia. One of the greatest architecture landmark by Antoni Gaudi. It is still in construction and the facades are quite impressive as it is the interior.

• Casa Battlo; A beautiful private house, another great project by Gaudi.

• Casa Mila: A few meters away opposite Casa Batllo is another building by Gaudi. Don't forget to go to the roof to admire the design of the ventilation towers.

• La Rambla: a lively promenade that lead to the port, there you can enjoy street music and outdoor shopping.

• Museo Picasso: In the old Gothic quarter of Barcelona (Barri Gotic), it hosts one of the best collections and early works of the renowned painter.