Along Tunnel Ridge Road is the Tar Kiln Interpretive Site. A short walk from the parking lot into the forest will lead you to the remains of an old pine tar kiln. Scattered throughout the Red River Gorge are circular remains of earthen mounds. These mounds, like the one found behind this parking lot, are where tar kilns once stood in the 1800’s. “Tar Burners” toiled for 40 days burning logs of pitch pine trees to produce about 200 gallons of pine tar. The pine tar would flow into the drainage grooves for collection. Tar was used in the manufacturing of useful products including medicine, ropes, ships, and axle grease for early wagons.