Niagara Cave
A Minnesota cave with one-hour guided tours of about a mile underground, past fossils, an underground stream and waterfall, and a wedding chapel.
Harmony, MN, 48°F inside
Caves in Minnesota
2 caves in Minnesota run public tours. Here is what each one is like and how to visit.
Updated 2026-10-22. 2 of 2 checked in full against official sources.
Mystery Cave
Minnesota's state park cave, with an ADA-accessible one-hour scenic tour on paved trails at 48°F; the 2026 season has ended and tours resume May 8, 2027.
Minnesota, 48°F inside, from $15
Minnesota caves side by side
| Cave | Inside | Adult ticket | Run by |
|---|---|---|---|
| Niagara Cave | 48°F | not yet checked | Privately operated |
| Mystery Cave | 48°F | $15 | State park |
Questions people ask
How many caves can you tour in Minnesota?
2 show caves run public tours. We leave out wild caves that are closed, gated or need a permit.
What should you wear in a cave?
Closed shoes with grip, because paths are often wet. Most caves stay between the high 40s and low 70s °F all year, so a light layer is enough.
Caves in other states
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