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Mystery Cave, Minnesota's longest cave, is once again open for scenic tours

But it isn't a full return to normal quite yet.

Mystery Cave, the longest cave system in Minnesota, is once again open for tours.

Scenic tours of the southeast Minnesota cave started again Thursday, July 1, and will operate on a first come, first serve basis through July 12. After that, the Minnesota DNR recommends making a reservation in advance, though unsold tickets may be available for walk-ins.

Last summer, amid the COVID-19 pandemic, tours of the popular cave were canceled. But things aren't quite returning to normal.

Currently, the DNR is only offering the one-hour scenic tour, a .75-mile walk on modern paved trails and metal bridges that is both wheelchair- and stroller-accessible. Tours run 10 a.m. to 4 p.m., Thursdays through Mondays, and will end Sept. 6.

Other tours that have been available in the past — such as the lantern-lit tour, or four-hour "wild caving" tour — are listed as unavailable in 2021.

Mystery Cave is part of Forestville/Mystery Cave State Park in Preston, Minnesota. The system was discovered in 1937, and has over 13 miles of underground passageway.

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