Niagara Cave in Midwest 2024

A huge cavern is famous for its impressive underground waterfall

Best time: April–October

On Minnesota’s southern border near the town of Harmony, you will find Niagara Cave. One of the largest in the Midwest, it boasts an 18-meter (60-foot) subterranean waterfall, 30-meter (100-foot) ceilings, unique fossils, and an echo chamber. You will even find a wedding chapel there. In Niagara Cave, you can see canyon-like passageways created by water from an underground stream.

Discovered in 1924, the cave could be millions of years old. According to the legend, it was found by a local farmer who went looking for his three pigs that disappeared and found them 20 meters underground. Public tours started in the 1930s. Currently, visitors can attend an hour-long guided tour, which includes a mile-long underground hike. The Niagara Cave is accessible from April to October.

Niagara Cave has a temperature of 48°F (9°C), so a light jacket is always a good idea. Don't forget to wear proper shoes (no flip-flops, Crocs or heels) and keep in mind that backpacks or backpack baby carriers are not allowed inside.

Practical info

When can tourists visit Niagara Cave?

Niagara Cave welcomes visitors from April to October, while the best time for tourists is on non-peak season weekdays, from May to September. The temperature inside the underground structure remains at a constant 48°F (9°C), so tourists should dress accordingly to enjoy the cave's features properly.

What makes Niagara Cave special?

Niagara Cave features a large underground waterfall and a wedding chapel, making it one of the largest caverns in the Midwest. The cave presents uniquely high-ceilings, roughly 30 meters high, and offers a view of distinct fossils. Passages in the cave resembling a canyon were created by underground streams.

Where is Niagara Cave situated?

Located close to Harmony, Minnesota, lie the southern borders of Niagara Cave. The cave, 135 miles from Minneapolis, is easily accessible by car through the scenic Root River Bike Trail or Highway 52.

How long is Niagara Cave's guided tour?

Niagara Cave's guided tour has a moderate difficulty level and lasts approximately one hour. The tour guide exhibits cave history, and tourists may take breaks on the route's numerous benches. Professional guides lead the tour and offer informative responses to all tourists' concerns.

What should you wear during a Niagara Cave tour?

The steady temperature of 48°F (9°C) inside Niagara Cave requires tourists to wear warm clothing. Tourists must wear closed-toe sneakers or hiking boots, keeping footwear like flip-flops, Crocs, or heels at bay. Furthermore, visitors mustn't carry backpacks or use backpack baby carriers. Finally, helmets and flashlights will be presented upon entrance.