New drone footage shows massive progress on Tesla's giant Gigafactory

Behold: Tesla's Gigafactory in Sparks, Nevada.

New drone footage shows that a large portion of the factory, which in total will stretch for about 6 million square feet, is already done.

But clearly, there's still some more work that needs to be done. The factory is currently producing battery packs, but will begin producing battery cells in 2017. It won't be fully operational until 2020.

The drone footage really lets you appreciate how massive the Gigafactory is — those people on the roof look like ants!

And you can also see just how large the campus is. The factory is located on a 3,000-acre plot of land.

"The Gigafactory, when it's complete, will have the biggest footprint of any building in the world. Counting multiple levels it could be as much as 15 million square feet," Musk said in an an interview with Leonardo DiCaprio for the documentary "Before the Flood."

Tesla said the factory will help reduce the price of its batteries by about 30% when it's fully operational in 2020.

Tesla will become the biggest producer of lithium-ion batteries once the factory is complete.

But a building this big comes at a price — Tesla and its partners will invest a collective $5 billion in the factory by 2020.

When complete, the factory will house around 6,500 employees. Robots will also perform some tasks.

There are some other cool elements to Tesla's Gigafactory campus that the drone footage didn't pick up, like wild horses that roam the premises.

There's also rail cars that transport the raw materials that will be turned into batteries.

Tesla plans to build another Gigafactory in Europe and will begin looking for a location for its second battery plant in 2017. Until then, take a look at the drone footage of Tesla's very first Gigafactory.

A previous version of this article was written by Business Insider's Cadie Thompson.