Parc Güell is a public park/ garden in Barcelona noted for its Art Nouveau architecture. Designed by Gaudí for Count Güell, it was originally commissioned to be a housing development. Construction was never completed and it was eventually converted into a public garden in 1922.
I found Parc Güell to possess a certain fairy-tale quality, even more so than the other Gaudí UNESCO sites. Probably due its gingerbread-like buildings, bright mosaics and overall whimsical flamboyance.