Red Wing, Minnesota , is known for its beautiful, natural scenery. But there's also a man-made structure that's catching the eye of visitors.

He Mni Can Barn Bluff rises 300 feet above the Mississippi River.

"It can be a little challenging, but it's a good workout," said visitor Angela Hurley. "And once you get to the top, it's just beautiful views."

On a good day from the top, you can almost see Minneapolis 50 miles away.

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"It's very sacred to our local Dakota tribe and other Native American tribes in the region," said Steve Coh, Red Wing's planning manager.

The bluff is also full of limestone. In 1882, a man named Gustavus Adolphus Carlson built a massive kiln into the side of the slope to harvest the stone.

The kiln was basically an oven that burned 24-7. Inside, temperatur

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