This is the Brennan Monorail, a train from the early 1900s that seemed to defy the laws of physics.
Not only did it keep itself perfectly balanced on a single rail, but it mysteriously leaned into corners without any driver input.
This was a real invention and it was unveiled to the public in 1910 by its inventor Louis Brennan.
The idea was that using a single rail instead of two would make trains faster and Railways cheaper to build.
His train could take corners greater speeds without being thrown off the tracks and his Railway only needed half the material.
Unlike the monorails we're familiar with today which have thick tracks built high in the air Brennan's monorail could run on existing tracks.
Although it looks a bit sketchy, it was by design very stable.
At the heart of the train was a gyroscope that could correct the train's tilt before the passengers even noticed.
This was a mind-blowing piece of engineering, especially for 1910 But how did it actually work?
We modeled the entire thing and studied the original patents to show you how incredibly clever this design was.
