If you can't stand flying then this journey might be for you, as the longest train ride stretches 18,755 kilometers but will set you back a lot when it comes to the ticket price.
While Elon Musk has plans for flights that take you across the world in under an hour, this particular train brings a different perspective to travel.
We've heard of people living on trains for less than you might expect, and dangerous 24-hour sleeper trains that you'd rather avoid, but the longest locomotive journey on Earth has a bit of everything.
Stretching 18,755 kilometers, 13 different countries, two whole continents, and three continuous weeks of travel, this could be the next big challenge on your bucket list.
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Starting in The Algarve - Largos, to be precise - this journey is unfortunately not one unbroken ride but instead a serious of continuous tickets that mean that you never stray from a station or take an alternate mode of transport.
From Portugal you'll head north towards France, and then continue east across central and eastern Europe until you reach Russia.
After you get to Moscow you'll have to travel over 60 hours on one train in order to get to Beijing, in a ride that spans the entirety of Russia's roughly 9,000 km length before dropping into China.
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Once you've reached the Chinese capital, you'll then embark upon a journey through Laos, Thailand, and Malaysia, before reaching the final destination in Singapore.
As wonderful as it would have been to continue the journey into Indonesia, there's unfortunately the small obstacle of the Indian Ocean in the way.
The journey also relies on there not being a war in Ukraine and Russia too, which right now is obviously unavoidable and makes the journey impossible.
What's remarkable about this three-week long journey is that, as reported by Mashable, it still produces a mere fraction of the carbon emissions of a comparable flight from Lisbon to Singapore.
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The flight would track up 1.67 tonnes of of CO₂ emissions, whereas the train results in a comparatively miniscule 0.08 tonnes - just under 5% when put next to the flight.
What's more, the train journey would 'only' cost around $1,350 which, while three times the price of an equivalent flight, isn't actually that bad for three weeks of continuous travel.
Social media users have, as always, chimed in with some humorous responses, as X user 'Epic Maps' shared the journey map to the platform.
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"Imagine realizing halfway through that you left your stove on," one user proposes, which is more than enough to send any nervous traveler into a meltdown.
Another user wonders if "the passenger needs a bunch of visas to make this trip," and they're unfortunately correct. You'd need at least seven different visas to complete this journey legally, making the planning stage arguably as challenging as the journey itself.
If you love traveling the world though then there's little stopping you taking this challenge on - after all, it might be safer than some supposedly relaxing cruise ships.