I was really surprised that in my 30 years of living in Indiana, I had never been to Marengo Cave. It's both great for kids and adults. The people are super friendly and there are two different parts to explore. The dripslide caverns and the crystal palace cavern. There are extra activities for the kids such as mining and a nice gift shop for any rock lover out there. I highly recommend and they had cabins to camp in as well.