There is a wealth of research from around the world, particularly Japan, which proves that being in a forest, or wooded area, really can have a healing effect.  It has been shown that trees and plants in these environments release antimicrobial essential oils, called phytoncides.  Phytoncides protect plants from germs and have a host of health benefits for people. These oils can boost our mood and immune system function, they have been shown to normalise blood pressure and heart rate, as well as improve stress, anxiety, concentration, sleep and stimulate creativity.  There is some evidence that they may even help fight cancer and depression.  In some countries like Japan, forest-bathing is already recognised as a clinical therapy and is available on prescription.