Japanese 'Tree bathing'

Called Shinrin-yoku, “The idea is simple: if a person simply visits a natural area and walks in a relaxed way there are calming, rejuvenating and restorative benefits to be achieved. 

We have always known this intuitively. But in the past several decades there have been many scientific studies that are demonstrating the mechanisms behind the healing effects of simply being in wild and natural areas. (some of this research is available here). For example, many trees give off organic compounds that support our “NK” (natural killer) cells that are part of our immune system's way of fighting cancer.” [excerpt from the site www.shinrin-yoku.org 2016]

How Forest Bathing can improve your health. [excerpt from Business Insider, contributor Dr. Qing LI in May2018]