Collserola National Park
Located less than 30 minutes from Barcelona lies the Collserola National Park which is the largest metropolitan park in the world. Known as Barcelona's "green lung", the park is rich with amazing greenery, flora, fauna, and wildlife.
The park is also home to over 190 different species including squirrels, foxes, bird species, and even the odd wild boar.
The park is scenically placed above Barcelona and covers over 8000 square kilometers of land. It's the ideal place for taking a hike, riding a bike, or stopping for a picnic.
Top attractions within the park include the Torre de Collserola (an observation tower), the Verdaguer House museum, and the 14th century castle ruins of Castellciuro.