Caves

I am back at work now on my lunch break. I went to caves at Spring Mill State Park and then we went to Marengo cave. Those were cool. At the Spring Mill State Park, near Mitchell, IN there is a cave called Donaldson cave where you can walk on the dry side of the cave and then inside there is a small opening where you can continue to go back. Very cool. Michaela, Megan and I went in about 150 feet I would guess and then I shut off our lights and we were scared. We also went on a boat ride through Twin caves at the park, cheap only $3 per person and after you go back about 1/8 of a mile(i am guessing) he shuts off the lights and it is pitch black. He tells us that your eyes never adjust to the dark. It makes me thankful for light. It also makes me think of Jesus being the light of the world and how hell will be dark like that only worse with fire.
I would like to go speulunking(I know it is misspelled) sometime in another cave that is private. If anyone knows of any private caves let me know.