It seems that Los Angeles is actually sitting atop a 20 billion barrel oil reserve. In fact, the city was originally founded as an oil town. There are actively working oil wells positioned discreetly all over the city. Some hidden in buildings and other urban structures, others just concealed from view. And there’s lots of tech in use to make the operations virtually silent and otherwise unnoticed by the residents and visitors. For a city that can’t seem to keep a secret about much of anything, this has certainly flown under the radar.

A camouflaged oil rig in LA:

For more info there’s a short but interesting documentary available.