
'Palace on rails': French designer Thierry Gaugain is hoping to take the rail travel experience to a new level with his latest concept, a private luxury train made for just one owner.

Futuristic design: The G Train will measure 400 meters and is to be made of hi-tech glass that can be switched from opaque to complete transparency.

Unique project: "The owner we envision is someone who is aware of the uniqueness of this train and understands that we are not just talking about transportation,"Gaugain says. "It's about travel, not how fast you get from point A to point B."

'Secret' garden: The G Train is to have a garden on board that gives passengers the opportunity to "explore different atmospheres each time."

Party central: The wings of the train can be folded down to create alfresco terraces, where elaborate parties can take place as well as concerts.

Instant transformation: "The train is a stage," says Gaugain. "You can change the light, the season or the pace in order to change your relationship to time."

Long distance travel: With space for up to 18 guests, the train will run at 160 kilometers per hour and is set to be adapted to travel on railways across the Americas and Europe.

Rediscovering travel: Gaugain believes that there is too much emphasis on speed when it comes to travel, and sees the G Train as a place where those on board can slow down and enjoy the journey.

Complicated concept: The designer is working with a number of experts, such as Swiss train builder Stadler, glass manufacturer Saint-Gobain, UK engineering firm Eckersley O'Callaghan and security company Marine Guard onboard to ensure that the concept is "feasible."

Multi-million dollar train: If Gaugain finds a buyer for the concept, it's likely be at a cost of around $350 million and the G Train will take at least two and a half years to build.