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  2. Niagara Cave - Wikipedia

    en.wikipedia.org/wiki/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]

  3. Forestville Mystery Cave State Park - Wikipedia

    en.wikipedia.org/wiki/Forestville_Mystery_Cave...

    The park is about 5 miles (8.0 km) from Mystery Cave and occupies approximately 3,170 acres (12.8 km 2), with camping, interpretive programs, and hiking, horseback, cross-country skiing trails, cold water streams and excellent trout fishing. The cave includes stalactites, stalagmites, and underground pools, and is a constant 48 °F (9 °C). It ...

  4. Harmony, Minnesota - Wikipedia

    en.wikipedia.org/wiki/Harmony,_Minnesota

    The cave, containing 5 miles of passageways, was accidentally discovered in 1926 by a local pig farmer. It has been open to the public since 1933. [10] Harmony is the southern terminus of the Harmony-Preston Valley segment of the Blufflands State Trail. The Harmony-Preston State Trail connects the town to the renowned Root River Trail system.

  5. Southeast Minnesota caves steeped in lore - AOL

    www.aol.com/lifestyle/southeast-minnesota-caves...

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  6. List of caves in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_caves_in_the...

    20 Minnesota. 21 Missouri. 22 Montana. 23 Nevada. 24 New Hampshire. ... Forestville Mystery Cave State Park; Niagara Cave, Harmony; Spring Valley Caverns; Tyson ...

  7. Lake Vermilion-Soudan Underground Mine State Park - Wikipedia

    en.wikipedia.org/wiki/Lake_Vermilion-Soudan...

    The Lake Vermilion-Soudan Underground Mine State Park is a Minnesota state park at the site of the Soudan Underground Mine, on the south shore of Lake Vermilion, in the Vermilion Range (Minnesota). The mine is known as Minnesota's oldest, deepest, and richest iron mine. It formerly hosted the Soudan Underground Laboratory.

  8. Spring Valley Caverns - Wikipedia

    en.wikipedia.org/wiki/Spring_Valley_Caverns

    Finally, in 1968, they opened the cave to the public for tours. However, a year later Latcham lost the cave due to foreclosure, and it was sold to a new owner who kept the cave open to the public until 1971. In 1989, John Ackerman purchased the cave, and remains the present owner. [2] Ackerman progressively discovered five more miles of cave ...

  9. Tyson Spring Cave - Wikipedia

    en.wikipedia.org/wiki/Tyson_Spring_Cave

    Tyson's cave is a solutional cave privately owned by the Minnesota Cave Preserve. It is known for the extinct ice-age bones found scattered throughout the cave rooms. The majority of this extensive cave is approximately 120 feet below the surface and is estimated to be 3.5–5 miles in length, [1] making it the 258th longest cave in the United ...