Forests cover nearly a third of the Earth's land surface, and each one is different. The Dragon's Blood Forest in Yemen is like an alien landscape. Hawaii's Rainbow Eucalyptus Forest is nothing ...

Qing Li, the president of the Japanese Society of Forest Medicine, founded in 2007, also is a senior professor at Nippon Medical School in Toyko. He has studied the effects of forest bathing.

Spending time in the forest isn't just enjoyable, it's good for your health. NPR's Life Kit has research-backed exercises to try the next time you're among trees.

Today is International Day of Forests. And it turns out trees are good for our health. Studies show immersing yourself in nature — especially a forest — can reduce stress and lower blood pressure.