6. Parc Guell, Barcelona
One of the most unconventional greenspaces on this list, Barcelona’s Parc Guell began construction in 1900 as the private garden of the park’s namesake, Eusebi Guell. After it was opened it the public in the 1920s, the park is a showpiece of famed Catalan architect Antoni Gaudi. At Parc Guell, it’s not just the flora and fauna on display, it’s also the spectacular terraces, towers, stairways and buildings, replete with colorful mosaics and sculptures. Parc Guell is an urban park — and art — lover’s dream!
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