We've all heard of private yachts and private jets. But now the French designer Thierry Gaugain has designed what he calls the "world's first private luxury train."

Gaugain is a prolific designer who has worked across multiple fields, designing furniture, glasses, motorbikes, and private planes.

Gaugain has also designed yachts and helped create Apple cofounder and former CEO Steve Jobs' 260-foot yacht Venus.

But now, for the first time, Gaugain has decided to create a design for a private luxury train, in part because "everyone loved trains in their childhood," he told Insider. "It's an old dream coming through," he added.

Yes, he could have designed an Amtrak train or a passenger train. But why do that when you can create the "ultimate way to travel" in luxury.

We all know the expression "it's about the journey, not the destination." Well, that was the intention of the G Train.

"During my years of working on travel concepts, I fine-tuned all the ideas of journeys, how to move, and how to discover the world," Gaugain said. "It appeared to me that a train for a one unique owner, [like] a yacht, was a very good way to reinvent the idea of journey."

Like other methods of transportation Gaugain has designed, the G Train was created to be a place to live. This was done by integrating technology, art, and light: "This train is meant to be a stage changing all the time by mechanical or digital means," he said.