There are many distinctive rock formations within the caverns, such as this one named "Two Witches of the Grottoes." Can you see the two witch faces? The top witch has a rounded nose and a pointy chin. That pointy chin becomes the hooked nose of the second witch.
Feel a chill? It's not from the spooky witches. The cave's temperature is a constant 52 degrees Fahrenheit year-round, so you may also want to bring along a light jacket or sweater.