It's impossible to miss La Sagrada Familia while in Barcelona.  Not only does it dominate its nearby landscape (having its own metro stop), it's also the last and maybe most famous work of Gaudí.  The sheer immensity of it is rather awe-inspiring, like a stone forest canopy...

At night families, joggers, and dogs abound in a nearby park and the reflection of La Sagrada Familia resembles a Monet painting on the lake, composed of softened shapes of light.