No
No self guided tours aren't offered
No, no self-guided tours are available.
I am very sure self-guided tours are a no, no. Times for guided are listed, check the Web site or mercer county's page. The tour is about an hour and a half or more but very worth the trip.
I don't think they do self guided tours, it's very easy to go lost or turned around and there are very narrow areas. The tour is about an hour long.
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