We’ve all heard of private yachts and private jets . But now 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 co-founder and former CEO Steve Jobs’ 80-metre yacht “Venus”. But now, for the first time, Gaugain has decided to create a private luxury train design, in part because “everyone loved trains in their childhood”, he said. “It’s an old dream coming through.” Is this the most expensive superyacht in Hong Kong? Yes, he could have designed an Amtrak 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 transport Gaugain has designed, the G Train was created to be a place to live too. 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. It’s not a hotel on wheels – it’s a “palace on rails”, Gaugain continued. Meet Oliver Daemen, the Dutch teen flying to space with Jeff Bezos “Our aim for this G Train is to design a palace on rails that could look like a snake under the sun or a night bird,” he said. Let’s take a peek around the 14-car, over 400-metre long train. Gaugain imagines a potential owner of this train would be someone who is “certainly exceptional, maybe someone looking for a new chapter of his life”. According to the designer, everyone involved in the project – from himself to Swiss train builders to French glass makers – worked for several years to “ensure the feasibility” of the G Train. The G Train can hit almost 160km/h and can operate on railways in places like the US, Europe and Russia. The train’s owner can host family, business partners and party goers aboard the G Train. A US$6,000 burger? Crazy expensive junk food around the world One of the most noticeable features of the train concept is its smart glass covering, which can switch from total transparency to a gold-toned opacity with a push of a button. Creating a glass-encased train – we’re talking almost 3,500 square metres worth of glass – allows the train’s owner to bring the outdoors into the train. Therefore, light plays a central role in the design of the train. Natural light through the glass walls and digital lighting systems help set the mood aboard the “palace on rails”. The G Train’s 14 cars have a variety of rooms and uses, from bedroom suites to a garden to an art gallery. There’s even enough room to accommodate 18 overnight guests – not including any of the crew – in the VIP suites. The owner’s sleeping quarters and living room cars are separate from these guest suites and come with features like a family dining room, office, bathtub and large bedroom. The train also has a “social centre” with winged terraces on both sides of the car. This space is perfect for parties, shows or dinners. 3 uber-luxe hotel launches for your first pandemic-friendly getaway But if the owner wants some peace and tranquillity instead, they can head to the garden car, which is customisable per season. There’s also a car dedicated to toy storage, but we’re not talking about board games and stuffed animals. Toys in this instance means off-road vehicles, motorbikes and even flying cars. The G Train is customisable, which means there’s even an option to turn one of the cars into a swimming pool or a catwalk for a fashion show. Gaugain estimates building all of this could land at around US$300 million, even upwards of US$350 million. Yes, that’s a large range, but that’s because the exact pricing hinders on all of the amenities and artwork the G Train’s owner might want. The train would then take over two years to build. This cost and time may seem like a turn-off to potential buyers, but Gaugain says trains will be “vehicles for the future” due to their sustainability, and in G Train’s case, technology-forward amenities. This article originally appeared on Business Insider . Want more stories like this? Sign up here. Follow STYLE on Facebook , Instagram , YouTube and Twitter .