There are many benefits of forest bathing, a practice born in Japan almost four decades ago. After a walk of just two hours, it can lower blood pressure and glucose levels, stabilise the autonomic nerve zone, reduce levels of cortisol, the stress indicator, and increase the presence of NK cells (“natural killers”). The phytoncides released by the trees help us breathe better and the levels of haemoglobin are reduced in the part of the brain related to more stressful activities and increased in the part related to emotions, empathy and pleasure. In Els Ports Natural Park we can enjoy this guided activity, consciously walking through mature forests, past certain large trees that are included on the official list of Monumental Trees of Catalonia. During the walk we also learn about the importance of these forests as allies against climate change.