Nature Therapy
Positive outcomes from being in nature is a universal phenomena that does not discriminate or need any expert requirements. Readily available and with no cost. In the musical piece below this phenomena is conveyed in an artistic and metaphorical (or literal?) manner. I would recommend listening to it with some good headphones, outside where you feel comfortable and relaxed. Enjoy.
Scientific Literature
Flourishing in nature: A review of the benefits of connecting with nature and its application as a wellbeing intervention.
https://www.internationaljournalofwellbeing.org/index.php/ijow/article/view/449/509
Urban green spaces and health - a review of evidence.
Aesthetic and Affective Response to Natural Environment.