which module created this page??

I took over management of a site and I'm trying to figure out how it's put together. I've got a blog page and I can't tell where it came from! Most of the pages in the site are generated by Views, but not this one.

It can be tricky to track things back to their source. Is there a module that will tell me what created a page/block/menu item/others. Or perhaps a way to simply add a tag into the markup that would give me a clue?

Thanks

Gabe