Displaying photo outside wwwroot

For security reasons, I am uploading photos to OUTSIDE the /inetpub/wwwroot/ area on my server. 

To c:\isolate\

Then emailing the admin a copy of the photo for admin to approve photo. 

How do I get the photo display???

Under normal circumstances, I simply do a:

<img src="http://www.domain.com/images/photo_name.jpg">

But what when it's outside the web root?

I have tried what I thought was the obvious

<img src="c:\isolate\photo.jpg">

I do not get an "error" (a "symbol" top left of the image) but I get a blank. 

What am I missing?

Not really a CF issue, more an HTML one?