Hidden beneath the streets of Minneapolis lies a strange geologic anomaly.

It's called Sheik's Cave.

Above the cave, the city is alive, full of vitality and character.

The glow from buildings cast shadows over the streets.

The skyline blends, old world charm with modern design.

Traffic comes, buildings tower, but deep below all of that. there is a secret buried down there.

Access to it lies deep below the street.

What appears as a simple manhole cover leads to an entirely different world down below.

It's a perfect maze underlying a full city block.

Greg Brick, an urban explorer and longtime Minneapolis resident, as was I once, had known

about the cave for years.

It was just the sense of remoteness.

You got this cave 75 feet below street level with a well-known history dating back to 1904,

and nobody that I was aware of had been there. The manhole cover was a gateway inside.

However, as much as the city wanted to keep it secret, Greg Brick knew it was there and was desperate to get inside.

I'm Dylan Thuris, and this is Atlas of Skira,

a celebration of the world's strange, incredible, and wondrous places.

Greg's first attempt, it led to a dead end. But back in 2000, back in fact,

when I was a senior in high school in Minneapolis, Greg was also there finding his way inside this

cave. And when he got in there, he made a shocking discovery. That story after this.

Greg Brick was obsessed. For years, he had sifted through old newspaper articles, exploring the history of this cave.

He turned to old guidebooks, trying to find something, anything, about the history of this cave.

...