Indiana Caverns which is a cage that is littered with bones from the Ice Age has been opened to the public. USA Today reported that the bones are believed to be among the largest group to be discovered in one cave. Marketing manager Carol Groves said that the bones are the "frosting on the cake."

The caves are located in Southern Indiana which is about 25 miles west of Louisville, Kentucky. "Experience panoramic views of Big Bone Mountain and its enormous piles of breakdown and amazing waterfalls, one crashing down almost 40 feet onto flowstone. Uncover the cave's rich past and the animals that called it home, as you learn about its ancient bones," says the cave's website.

When members of the Indiana Speleological Society first found the bones they thought they were from cows, pigs and livestock that had been disposed of in a sinkhole but further examination revealed that the bones were from ice age bisons, peccaries which are related to pigs, bear skulls and other animals that had entered the cave that closed 10,000 years ago.

"This is the third cave attraction developed by Grove's brother, Gary Roberson. It occupies the uppermost level of a complex cave system and includes steel walkways through a 180-foot room that descends to the underground river," reported USA Today.

"When the Indiana Cavern's portion of Binkley cave system was discovered in 2010, massive amounts of bones were seen, coining the name "Big Bone Mountain". Initially they were assumed to belong to historic and common farm livestock," says the cave's website. With a new entrance created in 2012 (bypassing 5 hours of crawling through water), the Indiana state paleontologist visited. He immediately realized our bones were extraordinary and of significant importance."

There is a one hour, 20 minute tour that costs $18 for adults and $9 for ages 4-12.