Thanks for sending a link to the photo on Facebook so I could also see it. As you will see momentarily, dear reader, it's a truly astonishing bedroom setup, though I'm skeptical that I could actually fall asleep in the room. But to lay there and watch the fish? Staggering.

Anyway, let's stay focused.

While a lot of people know that Google Image Search is a useful tool -- I use it quite frequently, actually -- few people have figured out that you can actually use it to search for images similar to a specified photo, image or illustration, whether it's somewhere online or an image you have on your computer.

I'll show you by demonstrating how I took the photo from Facebook and figured out where it was from...

To start, here's the original post on Facebook:

The image here is probably big enough, but if you click on it, you'll see a larger version (along with a lot of funny comments):

At this point, just click and drag the photo off the page and onto your Desktop. Now you've got something to work with!

Open up your browser and go to images.google.com. It'll look the same as it ever does:

See the little camera icon just to the left of the blue search button? Click on it.

Now you'll see that there are two ways to specify the image you want to search against:

Click on "Upload an image", then click "Choose File" to proceed:

Once you choose the file and submit it to the search engine, it takes a fraction of a second for lots of useful and interesting results to appear:

And there you go: It turns out that's a bedroom suite located 16' below the surface of the ocean on Conrad Maldives Rangali Island, in the Indian Ocean.

Oh, and do check out how the search box itself has changed to show you a tiny thumbnail of the image you just uploaded:

Quite a helpful trick to know about because photos all too commonly take on a life of their own, without anyone ever checking to see what they're actually about. Now you know how!