Where can I find localhost files with Apache?

I recently installed Apache and enabled "localhost" with Windows. When I type "localhost" in my browser, it takes me to a page explaining that the Apache installation was successful. I just don't know where to find it. Is this reading some index.html file? If so, I just can't find it.

I tried to navigate to C: \ inetpub \ wwwroot but "localhost" in the browser doesn't read it from that location. Where else does it read localhost? I am using Windows 7.