Why is there a sea in the middle of California?

In the middle of the California desert, there's a lake so big people call it a sea. But it shouldn't be there at all.

The Salton Sea is California's largest lake, but it's an accident, the result of what might be the biggest engineering mistake in American history. And now it's slowly turning into a toxic dust bowl, creating an environmental health crisis for at least 3 million people in Imperial County.

We'll take you to the toxic shores of the Salton Sea to explain how this beautiful disaster in the desert happened in the first place -- and why even a $250 million restoration project isn't enough to fix it.

Watch the full film on our YouTube channel.