A rare look inside Tesla's electric car factory

AP Photo/Jeff Chiu

Tesla rarely lets cameras into its car factory in Fremont, California, where it assembles its high-end Model S and Model X. 

But the electric car maker recently let KPIX 5, a CBS TV affiliate in the Bay Area, into the massive facility to check out how its vehicles come together. 

Here's a look inside the secretive factory where Tesla builds its high-tech cars. 

Tesla's Fremont factory is massive. It's a one-mile long, 5 million square foot facility.

The facility is so big, in fact, that golf carts are used to get around.

It's packed with giant robots that can lift, rivet, and weld the car.

The robots also have names like Cyclops, Thunderbird, and Titan. 

Tesla uses robots made by the German robotics maker Kuka. The industrial robots are capable of lifting more than 2,000 pounds.