Is there a way to find all subpages of a webpage where link to those subpages are not directly specified?

I am looking at a webpage for e.g. abc.com/main/ and i also have many bookmarks with abc.com/main/page1, abc.com/main/page34, etc. But these pages are not hyperlinked anywhere on the main page. So, i wish to find all the subpages under abc.com/main/.

Is there any way to query this? Thanks.