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.^[5] The cave is privately owned, with tours available seasonally.^[6]

Key Information

Niagara Cave
Passageway in Niagara Cave
Location	Fillmore County, Minnesota, United States
Coordinates	43°30′50″N 92°03′18″W / 43.5140°N 92.0551°W / 43.5140; -92.0551[1]
Depth	200 ft
Discovery	1924[2]
Geology	Galena formation, Ordovician Limestone
Access	Tours are available in season
Lighting	Solar Energy[3]
Visitors	25,000 - 30,000 per year[4]
Features	Underground river, Subterranean waterfall, Wedding chapel, Fossils
Website	niagaracave.com
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The cave was first discovered in 1924,^[2] and in 1932, three spelunkers Al Cremer, Leo Tekippe, and Joe Flynn explored the cave and named the site Niagara Cave.^[7] Niagara Cave opened as a show cave in June 1934,^[4] and was described by geologist J Harlen Bretz in 1938.^[8]

The Minnesota Geological Survey noted in their 1995 survey, "Niagara Cave contains an excellent example of an underground river, complete with waterfall."^[9]

1. ^ "The Underground Waterfall of Niagara Cave". Atlas Obscura. Retrieved 15 May 2019.
2. ^ ^{a b} Binkley, Mike (6 July 2014). "Finding Minnesota: The Cave That Pigs Discovered". CBS WCCO. Retrieved 15 May 2019.
3. ^ Jeffers, Barb. "Niagara Cave harnesses solar energy". Fillmore County Journal. Retrieved 15 May 2019.
4. ^ ^{a b} Weiss, John (2014-06-07). "Niagara Cave celebrates 90 years, with lantern light". The Post Bulletin. Retrieved 15 May 2019.
5. ^ Smelter, Kyle (18 July 2016). "Niagara Cave: What Lies Below". Minnesota Monthly. Retrieved 15 May 2019.
6. ^ "3½ Hours to Natural Wonder". Maple Grove Magazine. Minneapolis, MN: Tiger Oak Media. 2014-07-01. Retrieved 15 May 2019.
7. ^ Hahn, Amy Jo. "Niagara Cave". Minnesota Historical Society MNopedia. Harmony Area Historical Society. Retrieved 15 May 2019.
8. ^ Bretz, J. Harlen (August 1938). "Caves in the Galena Formation". The Journal of Geology. 46 (6): 828–841. Bibcode:1938JG.....46..828B. doi:10.1086/624694. S2CID 129399722.
9. ^ Lively, R. S. (1995). "Minnesota at a Glance Caves in Minnesota". Minnesota Geological Survey. hdl:11299/59431. Retrieved 15 May 2019.

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