Adrian Power, 40, booked tickets months ago for the show, driving seven hours from Charleston, S.C., to mark the season with flair. Walking into the cavern, bathed in red light, she and her friend, Rhianna Johnson, 33, marveled.
A day earlier, Ms. Power had convinced Ms. Johnson, who is anxious about spending time in enclosed spaces, to take a lantern tour of another cave on the property.
Now Ms. Johnson found herself saying something she wouldn’t have before: “I would love to go again.”