What mysteries await below our feet? Discover for yourself by visiting one of these marvelous cave or cavern adventures.

"We were a bit hesitant at first, but apparently this was the normal standard for bringing babies into the cave," the mom told Newsweek.

If you’d like access to all of the park’s activities, opt for the adventure pass, which costs $179 for adults and $125 for kids ages 6 to 12. If you’re only interested in seeing the cave ...