As you can clearly see from my comment I immediately knew that this was an April Fool’s joke. But, it was clever and cute and I used to LOVE Toblerone. I used to bring bars over from Europe to the U.S. in the 1980s and hooked a legion of folks hooked on it. That was way before it became readily available here.
Well, this picture had me intrigued enough that I did some Googling. It was well known. It did NOT start off as a Toblerone train. Instead it was just a triangular train — the premise being that such trains would fit better inside tunnels. Somebody took the triangular train and made it into the Toblerone train and STUCK a comic driver in the cab JUST IN CASE we did not spot that it was a joke.
So, here is the original triangular train you can see the white house, with red roof, behind the train and realize that this is it. Note that the wheels got slanted!
And that was Photoshopped from this.
Again check the background and you can see the commonality.
Check Category ‘Humor’.