How to organise all my wordpress pages in the Backend 'pages' area

Hi
I have a WP site which has a main site with about 5 pages of info, 20+ location landing pages and then each of those has 3 - 5 pages under it.

The front end is fine, all nicely organised.

However the backend 'pages' section is really difficult to navigate and to see what's there. Is there a way to use folders to organise my pages or does that sort of functionality just not exist within WP?

Thanks!