Niagara Cave

Harmony, MN

4 (5 reviews)

Where are we going?

Manage attraction
Address: 29842 Co Rd 30, Harmony, MN 55939, USA Number: 800-837-6606 Website Contact How do we get there?

What is there to do?

You didn't think when you wanted an adventure, we would send you UNDERGROUND did you? Well, that's where we're going!

Niagara Cave is one of the most fascinating and unique geological attractions in the Midwest. It's a place that was formed over millions of years, and now YOU get a chance to explore it! Water has sculpted an entire underground system, with canyon-like passageways, and it's through tours that the family can learn all about them!

The one hour tour will take you one mile underground, and you will experience fossils that are around 450 million years ago. Can you imagine what life on earth was like back then!?

The formations in the cave vary, which is what makes the tour that much more interesting. They can be delicate, and the can be HUGE! There is even an underground waterfall that you can enjoy (parents, if you want, there is a subterranean wedding chapel to get married in, or renew vows, too!)

Niagara Cave is always 48 degrees F (9C) so dress appropriately. It also never matters what the weather is - you're underground! So no excuses on those rainy days not to get out of the house!

Once you have finished your tour, you can enjoy some above the ground fun, with an 18 hole mini golf course, or spend some time panning for gemstones and fossils. Do you think you might find something 450 million years old too! 

There is even a playground and a picnic area so you can really make a day of it.

A great experience to show kids how incredible nature can be, and give them a learning experience at the same time!

Niagara Caves....millions of years in the making for your family day out!


Suggest an edit

How much does it cost?






$8 (ages 4 to 12)


Free Under

3 years with paid adult


Last Updates


Additional Information

Wear walking shoes, not flip flops. Certainly no bare feet

Any top tips?


Check out the Saturday Night Lantern Tours at 6:30pm and 7pm from June to August! Great fun, AND mini golf will stay open until 8pm on those days!

I'm Hungry!


Healthy Eating There is a picnic area that you can use if you want to bring your own food. A great way to enjoy the day!

What people are saying?

Rate & Write a Review

Your rating

Where is it at?

Teachers corner


If you want to bring a group, give them a call about what they can do, and then just enjoy!

Can I get one of those?


If you want to take some pretty amazing gifts home like precious rocks and gems, then head to the gift shop! There are great books on the topic too

Need a little extra help?


With all the stairs on the tour, it's not accessible. However the gift shop, mini golf and gemstone mining are all accessible.

Click here for lots more great things to do near you in Minnesota

Baby Facilities

Strollers can't be used on the tour.

When can we go?

Tour times and days vary seasonally so check before you go.

April to December.

Sign Up to Our Newsletter

The best fun places to go with kids sent straight to your inbox!

Subscribe now