Rare Underground Waterfall in Minnesota Looks Like Something Out of a Sci-Fi Movie

Minnesota has some amazing waterfalls, from St. Anthony Falls to Gooseberry Falls, but only one will require you to take an underground tour.

Niagara Cave is located in Harmony, about 50 miles south of Rochester, it's about 200 feet deep and features a 60-foot waterfall, an underground stream, fossils, stalactites and stalagmites, and even an underground wedding chapel. Keep scrolling to see the photos and video.

This privately owned cave is open for daily tours 7 days a week May 1st through October 29th, they recommend that if you're planning a visit, make reservations online to avoid long wait times. The tour is $20.95 for ages 13+ and $12.95 for kids 3 - 12, kids under 3 are free.

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The hour-long tour will take you down and up a total of 550 stairs, so make sure you can handle that before starting the tour. Also, wear good walking shoes; flip-flops and Crocs are not recommended, and high heels and bare feet are not allowed on the tour.

The cave was discovered in 1924 and was given the Niagara Cave name in 1932 after it was explored, and it opened for tours in 1934. They also have a mini golf course and gift shop on site.

Niagara Cave has been ranked several times as one of the best caves in the United States, both USA Today and CNN have highlighted the cave as one of America's Top 10.

Niagara Cave is only one of two caves open to the public in Minnesota, and the only one with the underground stream and waterfall. Only three families have managed the cave since its discovery -- the Cremer family, the Vikre family, and current owners, the Bishop family.