How to add Site Hierarchy in Left navigation area of SharePoint site

I am wondering if this can be useful for you all.

I wanted to show all folder structure related to my site in left navigation menu, basically site hierarchy. For showing this you just need to enable tree structure on the page.

How to do that ->

1) Go to the SharePoint site.
2) Click on Site Actions -> Click Site Settings -> Click Tree View as shown below

3) Click on Enable Tree view.