The Niagara Cave in Harmony is rated one of the “Top Ten” rated caves in the United States and is only a mile from the Minnesota-Iowa border in southern Minnesota’s Bluff Country.
It was discovered in 1924 by a pig farmer and has since become a family owned and operated tourist attraction.
It features stalactites, stalagmites, calcite flowstone (this geology-obsessed girls dream), fossils, gem mining, a 60 ft. underground waterfall, an underground stream you can walk over, a subterranean wedding chapel and even mini golfing outside.
It was unbelievable.

Imagine walking through the narrow passageways of the Grand Canyon,
stopping to see things like the Elephant’s Head,
the alligator,
even a wishing well
and even Paul Bunyan’s bed!
My favorite part?
The echo chamber – where you can pound on your upper torso and actually hear the hollow of your chest cavity.
If it’s not on your bucket list yet, it should be.