One of the most remarkable buildings of Barcelona is the Casa Batllo with its richly decorated facade and no straight lines in its decor. Once this landmark was an ordinary dwelling, that its owner, a rich manufacturer, planned to demolish. However, the young architect Antonio Gaudi promised to redo the building out of all recognition and kept his word. In order to see the unique interiors of the house, where the Gaudi's creative activity started, and at the same time not to spend a lot of time in the queue at the ticket office and at the entrance, it is enough to buy online tickets with FastPass (pass without a queue) via Excurzilla service.
See also other sights in Barcelona: Catacombs, Pompeii, Herculaneum, Royal Palace of Caserta, Vesuvius