In what's has been transpiring on the internet as a proof of the biblical warnings of apocalypse in the book of revelations, the picture of the seven headed snake has kept a lot of people wondering on its authenticity.
Being an avid enthusiasts of creatures, I did a research on it and here's what I found.

The image is fake.It is merely a digitally-altered photo of a normal one-headed snake.Several versions of this photo have circulated over the past couple of years. In 2012, a three-headed variety of this photo was circulated, and by 2013 the number of heads had increased to 7. A five-headed version has also been seen.

Below is an image of the three-headed snake was claimed to be photographed in India when that image circulated in 2012 which happens to be an exact of image of the seven headed snake, only with lesser number of heads.

Original Photo:
As you can see, however, the originalphoto clearly shows a snake with one head.

Multi-Headed Snakes:
Multi-headed snakes have been found in nature (a phenomenon known as Polycephaly), but these are typically two-headed snakes, not three or seven as the fake photos above show. As recently as September 2014, a Turkish farmer reported finding a two-headed snake on his property. In that report, it was noted that snakes with two heads are at a disadvantage in the wild due to increased vulnerability to attack.In September 2015, a two-headed Albino Honduran Milk snake named Medusa gained worldwide attention when a video was released of the rare snake which was sold for $50,000. Medusa is currently on display as part of theVenice Beach Freakshow, which is considered to have the largest collection of two-headed snakes.

Here's a real picture of snakes with multiple heads found in Kukke Subramanya, Near Mangalore, Karnataka, India below:

Below is a picture of Medusa the albino milk-snake.
And another of a snake with two heads.


So yes, snakes having multiple heads do exists just as we have humans having multiple body parts attached to one body.

Aarghhh; I hate snakes. Thanks though; OP

Bro they're really beautiful. If u were taught that snakes are harmless, you'd love them die. But they're deadly so we gasto kill 'em.