The Coolest Underground Attractions in Minnesota

Minnesota boasts not only its famous lakes, forests, and prairies but also a plethora of captivating underground attractions waiting to be explored. From caves to mines and tunnels, the Land of 10,000 Lakes offers an intriguing subterranean world filled with history, adventure, and mystery. Here’s a glimpse into some of Minnesota’s most fascinating underground sites:

Niagara Cave, Harmony

Niagara Cave stands out as one of Minnesota’s natural marvels, renowned for its grandeur and size. Hosting a 60-foot underground waterfall, the highest in the United States, this cave is adorned with captivating formations like fossils, stalactites, and stalagmites. Additionally, it features a unique wedding chapel where hundreds of couples have exchanged vows. Guided tours spanning approximately an hour guide visitors through a mile of underground trails. Open from April to October, admission costs $18 for adults and $10 for children.

Wabasha Street Caves, Saint Paul

Initially carved in the 1840s for mushroom farming and storage, the Wabasha Street Caves in Saint Paul are now famed as man-made sandstone tunnels with a rich history. Once serving as a speakeasy and nightclub during the Prohibition era, these tunnels have hosted notorious figures like John Dillinger and Ma Barker. Rumored to be haunted by the victims of a mob shootout in 1934, guided tours, priced at $8 per person, delve into the intriguing history and alleged hauntings. Tours are available on Thursdays and Saturdays, with reservations required.

Soudan Underground Mine, Soudan

Delving into history, the Soudan Underground Mine stands as Minnesota’s oldest and deepest iron mine, operational from 1882 to 1962. Now transformed into a state park, visitors can descend via elevator to the 27th level, 2,341 feet below the surface, to witness the miners’ working conditions and lifestyle. The mine also houses an underground physics laboratory where scientists study neutrinos and dark matter. Tours, available from May to September, cost $15 for adults and $10 for children.

Mystery Cave, Preston

Discovered in 1937 by a farmer, Mystery Cave is Minnesota’s longest cave system, boasting over 13 miles of passages and chambers. Its intricate layout and unexplored sections contribute to its enigmatic allure. Guided tours, ranging from one to four hours, offer visitors the chance to marvel at various cave formations and features such as helictites and soda straws. Tours operate from April to October, with prices varying from $12 to $75 per person.


Beyond its scenic landscapes, Minnesota harbors an underground world ripe for exploration. From historical marvels to natural wonders, these underground attractions offer a diverse range of experiences for adventurers of all kinds, providing a unique perspective on the state’s rich heritage and geological diversity. Whether seeking family-friendly outings, romantic escapes, or thrilling adventures, Minnesota’s caves, mines, and tunnels promise unforgettable journeys into the depths below.

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