A walk in nature has brain benefits.

A walk in the park is found to reduce brooding/rumination and causes reduced blood flow to parts of the brain which probably cause those particular unpleasant activities.

http://well.blogs.nytimes.com/2015/...on=inside-nyt-region&WT.nav=inside-nyt-region

 

It reminds me of something Nietzsche said (I think it was him).

We love being in nature because it has no opinion of us.

 

That makes sense and seems to fit with the findings of the study nicely.