Geological formations have been named: the Diamond Cascade, the Grotto of the Gods, the Rainbow Lake, the Oriental Tea Garden, and the Capitol Dome, and these are lighted for display.

Many local farmers, including Abraham Neff, donated stone of their own property for the construction of the railway.

Their curiosity was piqued, so the boys retrieved ropes and candles and scrambled down the 275-foot twisting and winding shaft to make their way into the caverns.

In 2007, Hargrove opened the Yellow Barn to showcase his antique carriages and farm equipment, as well as to be a wedding and special events venue.

The acid slowly erodes the calcium carbonate, the main component of limestone, creating caves, sinkholes and springs throughout the landscape.