restore desktop background
A few months ago as I was browsing the web, I found a picture of one of the most beautiful places I've ever seen. Unfortunately it was just a pic with no caption to ID the location. I set it as my desktop background with the intent of eventually finding where it was and visiting there. This morning at the end of an 11 hour shift, I went to set a screen saver, and accidentally changed my desktop background. Since that pic isn't a default mac background, and I didn't physically save it anywhere, I don't know how to restore it. I spent about 40 minutes browsing images on the web again, with no luck. I checked the default location for desktop images and as expected, there are just the usual images. Any help would be greatly appreciated.
Mac mini (Mid 2010)