Nature is nature. There's something about the outdoors that gets our blood flowing smoother and our heart beating stronger. There's probably some sort of research about endorphins and all sort of science that cab explain why the wilderness refreshes us. 

             

           There are some beautiful lines said by Albert Einstein one of the greatest scientist of all time 

                    

                          "Look deep into nature, and then you will understand everything better" 
 

It seems strange the one of the  greatest thinkers of all time would give such praise to nature. The reality is that all the great math and science geniuses loved nature. Newtown's apple was the first and Fibonacci observed his sequence in nature before he made note of it. Just about every great discovery has come from a keen observation of nature