# Niagara Cave

- **Country:** United States
- **Depth:** 200 ft
- **Access:** Tours are available in season
- **Geology:** Galena formation, Ordovician Limestone
- **Website:** [https://niagaracave.com/ niagaracave.com]
- **Features:** Underground river, Subterranean waterfall, Wedding chapel, Fossils
- **Lighting:** Solar Energy
- **Location:** Fillmore County, Minnesota, United States
- **Visitors:** 25,000 - 30,000 per year
- **Discovery:** 1924
- **Photo Caption:** Passageway in Niagara Cave

Niagara Cave is a limestone cave located in Harmony, Minnesota. The cave is approximately 200 feet (61 m) deep; features include an underground stream, 60-foot waterfall, fossils, stalactites and stalagmites. The cave is privately owned, with tours available seasonally.

![Photo of Niagara Cave](https://upload.wikimedia.org/wikipedia/commons/b/b9/Passageway_in_Niagara_Cave.jpg)

**Source:** https://en.wikipedia.org/wiki/Niagara_Cave (Wikipedia, CC BY-SA)