Where does wordpress save pages?

I installed wordpress in its own directory and then set the “blog directory” to the root directory.

So, for example, wordpress is in http://atlanta-boxwoods.com/wordpress

But the index.php (main page) is at http://atlanta-boxwoods.com

That’s all fine and dandy, but when I make new “pages” like “contact us”
I don’t see it in the site’s root directory or anywhere.

I CAN go to http://atlanta-boxwoods.com/contact-us.php and it works, I just can’t see the file in my FTP directory! Where does wordpress save these files, in case I want to make an edit through another .html editor?

Thanks