But in every walk with
Nature one receives
far more than he seeks.
~John Muir
In Japan it's called Shinrin-yoku, or Forest Bathing. Japanese studies show that quietly walking in a forest for as little as half an hour dramatically increases signs of relaxation, including lower concentrations of cortisol, lower pulse rate and lower blood pressure.
This season, take a walk in through the Arboretum. Stroll through the Woodland Walk, the East Meadow or Black Spruce Glen. Slowly walk, listen, bend down to touch the mosses, and breathe deeply.