Is there a way to determine what is powering the content behind a URL?
You could try looking in the menu_router table, where the path column contains values like node/%/revisions/view. Also, the url_alias table has a source column (to check against the menu_router table) and the alias defining a path like /my-url.

I also use TextWrangler and PHPStorm to inspect my code. You could try to search.