At the time of writing, Bitcoin was knocking on the door of $3,900. With a price like that, it's easy to see why mining has become a game for only a few participants. But there's an even more fascinating aspect: the facilities they use. Abandoned factories, residential complexes, and even old hangars have been transformed into Bitcoin mines, packed with racks, cables, and fans to keep everything at the right temperature.

Inside the World's Largest Bitcoin Mines
Bitcoin

One of the most frequent complaints among gamers focuses on the price of graphics cards. The reason is simple: every model with an ideal cost-benefit ratio for cryptocurrency mining has disappeared from the market, or costs much more than originally announced. Some currencies heavily favor GPU mining (Ethereum tops the list), allowing an interesting number of solo operations. But once we move to Bitcoin, the rules change completely. These days, Bitcoin is the domain of ASICs—thousands of them working together to break the brutal difficulty of the calculations. And that leads us straight to the mines. Other outlets prefer the term 'farms,' but to be honest, they are small universes. A couple of years ago, we had the chance to get to know one of them:

That was just one of the six mines that existed in the city of Dailan, China. And I say 'existed' because their existence isn't particularly stable. Those in charge try to cut costs by any means, and if that means moving to another city, they'll do it without hesitation. Today I'd like to share a few examples of large-scale Bitcoin mining around the world. In general, they are remote places, with limited access, and without too many details that could identify them. In fact, they don't even have a name, unless there's a company behind them.

Unknown (China)

Inside the World's Largest Bitcoin Mines
A striking evaporation system handles the cooling
Inside the World's Largest Bitcoin Mines
The fans create negative pressure, removing hot air and forcing fresh air into the facility
Inside the World's Largest Bitcoin Mines
Just one rack...
Inside the World's Largest Bitcoin Mines
This picture gives us a better idea of the size
Inside the World's Largest Bitcoin Mines
24/7, no breaks

Genesis Mining (Iceland)

Inside the World's Largest Bitcoin Mines
Genesis Mining offers mining 'contracts' so others can participate without buying hardware
Inside the World's Largest Bitcoin Mines
Why Iceland? Cheap energy, cold climate, good internet connections
Inside the World's Largest Bitcoin Mines
Genesis doesn't just mine Bitcoin: it also works with Ethereum
Inside the World's Largest Bitcoin Mines
They started early, when Ethereum was worth a couple of dollars
Inside the World's Largest Bitcoin Mines
Ten thousand graphics cards in one place. And then we wonder why there's a shortage...

A Hangar in Russia

Inside the World's Largest Bitcoin Mines
Russia's largest Bitcoin mine is in a hangar
Inside the World's Largest Bitcoin Mines
Its exact location is 'a secret'
Inside the World's Largest Bitcoin Mines
It contains more than 3,000 devices
Inside the World's Largest Bitcoin Mines
The cost of electricity exceeds $100,000 per month
Inside the World's Largest Bitcoin Mines
But in that time it earns $1.5 million (in Bitcoins, of course)

Sichuan Mine (China)

Inside the World's Largest Bitcoin Mines
This mine (one of many in Sichuan) is very close to a hydroelectric plant
Inside the World's Largest Bitcoin Mines
Several people live on site, next to the machines
Inside the World's Largest Bitcoin Mines
Maintenance has no schedule
Inside the World's Largest Bitcoin Mines
The conditions aren't the best...
Inside the World's Largest Bitcoin Mines
... but that doesn't stop them.