This formation is over 120 feet around and 45 feet high. Looks like a redwood trunk.
These twin columns are over 40 feet tall.
This is our guide. The kids followed her and asked lots of questions, which she did really well in dealing with. She commented that they were much better behaved than the averge school group they get. This cavern, about 200 feet underground is a cathedral. It has an organ in the middle and each key is connected to a solenoid which taps a particular stalagtite whenever the key is struck. Took a long time to find those formations with the exact tone. They played a piece for us which was very impressive. This cavern is used for weddings amongst other events.
Another apparition of the ghost of the caverns.
Included in the price of admission, is their car and carriage museum. This is an old Benz vehicle I saw on a recent episode of Top Gear.