1Parc de la Ciutadella, Barcelona, Spain

Parc de la Ciutadella, Barcelona’s greenest park, provides a peaceful respite amid the city’s bustle (a metropolis that is also one of the cheapest destinations to fly to in Europe). 

Many native Mediterranean plants and trees thrive in the five-hectare green space. Several structures in the park are designed to promote biodiversity. Ping-pong tables and playgrounds are also available for children’s enjoyment. There is also a zoo and several museums in the garden.

 

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