Hidden River Cave is an 8-mile labyrinth dissolved by a subterranean river flowing beneath the historic small town of Horse Cave. In 1867, famed naturalist John Muir called it “a noble gateway to the birthplace of springs and fountains and the dark treasures of the mineral kingdom.” Guided tours descend 150 feet underground, an optional off-trail Wild Cave Tour, featured by Mike Rowe on The Discovery Channel’s “Dirty Jobs” series, offers a close-up look at the wonders of the underground ecosyste
