This space was a limestone and sandstone mining site in the 1800s. In 1960, the cave was converted into a roller rink, where Ted Nugent and Bob Seger performed. Curt Sleeper bought the cave and its surrounding three acres in 2004 for about $160,000. He spent another $150,000 to make the cave into his family's hardwood floored, three-bedroom home. When they ran into mortgage trouble, the Sleeper family put their home up for sale on eBay with a starting bid of $300,000. Luckily, the Sleepers were eventually able to refinance and keep their cave.