The Google+ view of the Photos did not allow me to find the secret link to a given photo within an album. The other interface which I believe is called Picasa Web Albums does.
Here is how to get back to the original Picasa Web Albums interface that has that feature: Use this special link to display the Picasa Web Albums interface, not the Google+ interface:
https://picasaweb.google.com/lh/myphotos?noredirect=1
Here is I stumbled upon it:
- Login to your Google Account.
- Go to http://support.google.com/picasa/answer/157000?hl=en&ref_topic=1689652
- Scroll down until you see "Picasa Web Albums".
- Notice it says "Looking for a simple way to get photos from your camera and computer on the web? Google's Picasa Web Albums provides 1GB of free storage that makes sharing your photos a snap. Visit http://picasaweb.google.com."
- Click on http://picasaweb.google.com.
- Wait for a little bit. At the top of the page that is loaded you will see a message that disappears after a few seconds/minute: "Click here to go back to Picasa Web Albums". A screenshot is shown below.
- That link goes to https://picasaweb.google.com/lh/myphotos?noredirect=1.
