Embark on an exciting hiking journey from Papiol to Valldoreix that takes you through stunning natural landscapes. The trail begins with an ascent to the Escletxes, a remarkable geological formation caused by erosion, creating a labyrinth of intriguing shapes. As you continue, you will reach Puig del Rossinyol, which offers breathtaking panoramic views of the Baix Llobregat and Barcelona. The pathway leads to the tranquil Ermita de la Salut, surrounded by lush woods, providing the perfect spot to rest before the final section towards Valldoreix, where the railway station marks the end of your adventure. This moderately challenging route is ideal for those familiar with hiking and offers an active morning through varied terrains. Participants should wear comfortable clothing, hiking shoes, and bring water and a small snack. This activity is led by Mireia Querol Rovira, a biologist from UAB, in collaboration with C.C. Vázquez Montalbán.