Collserola is the largest metropolitan park in the world, 8 times larger than the Bois de Boulogne in Paris, and 22 times larger than Central Park in New York. Living in Barcelona, this expanse of unspoiled nature is just a short metro ride away.
This hike begins just off Plaça de Karl Marx, in the Barcelona district of Canyelles. The Canyelles (L3) metro stop is a short within a short walk. The trail into Collserola is the old path of Saint Lazarus.