The Mammoth Passage tour piqued our interest, and was so easy even for our 5 year old we took a chance on the the New Entrance tour. It takes two hours and is labeled as moderately strenuous. While it was more active , it was far more exciting for all four of us. First travelers climb down hundreds of winding steps deep into the cave. We felt quite safe as most of the tour had sturdy, well maintained hand rails. We walked through narrow passageways and saw beautiful rock formations toward the end of the tour. We plan to return when the kids are old enough to do one of the more advanced caving tours.
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