The Great Lakes are a chain of five enormous lakes straddling the U.S. and Canadian border,

creating the largest freshwater system on Earth by surface area. Together, they hold about 21% of

the world's freshwater. The lakes include Lake Superior, which is the largest and deepest,

with a maximum depth of about 1,300 feet. Then there's Lake Michigan,

which sits entirely within the United States. There's also Lake Huron, which reaches a maximum

depth of around 750 feet and is dotted with numerous islands. There's Lake Erie, the shallowest,

with an average depth of only 62 feet. And finally, there's Lake Ontario,

the smallest by surface area,

but significantly deeper than Lake Erie,

with depths reaching just over 800 feet.

And during the summer, these lakes are picturesque.

Waves lap on the shores, boats full of family and friends Bob on the surface, but what you may not know,

and what I'm about to freak you all out about today, is that as you float slowly across the lakes

on a beautiful summer's day, there is mystery and horror that is settled at the lake's bottom,

just hundreds of feet below you.

For instance, deep beneath the waves of Lake Huron along the northwest coast lies what's known

as Shipwreck Alley, a graveyard of vessels spanning hundreds of years that never finished

their voyages.

Down there, nearly 100 shipwrecks lie eerily preserved, entombed beneath the icy water.

And it's also not just shipwrecks either. Bodies are down there. And they actually go through

a process called saponification, where the fat in the body turns essentially into soap, and it preserves them and gives it this terrifyingly waxy look.

Here, when the summer season ends,

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