Shinrin-Yoku, or "forest bathing," is the Japanese practice of spending time in forested areas for the purpose of enhancing health, wellness, and happiness. The idea is that by simply being in a natural environment, you can improve your health in significant ways.

One study published in 2007 by Qing Li from the Nippon Medical School in Tokyo found that natural killer (NK) cells - a type of white blood cell that can destroy cancer cells - increased in number and activity in individuals who spent time in the forest. The study also found that these effects lasted for about a month after the trip.

The exact mechanisms are not fully understood yet, but some theories suggest that the phytoncides (wood essential oils) such as alpha-pinene and limonene, which trees emit, may have an impact on our immune system. Another theory is that the calming, restorative effect of nature on our minds leads to decreased stress and improved immune functioning.

Either way the benefits are clear spending time in nature can improve your overall health and wellbeing.