Something unexpected sprawls underneath the ground in one of America’s most troubled cities. In fact, unbeknownst to many of the people treading the busy streets, a vast 1,500-acre complex lies beneath their feet.
And the story of this bizarre secret began long ago, before even dinosaurs walked the Earth. In fact, it all started as many as 400 million years ago, when this particular area of Michigan – the area where Detroit now stands – was just a huge basin of water.
What’s more, as water flowed into the area and receded, it left behind countless layers of salt. And, over time, these salt beds grew to cover many miles of land.