About

Natural Tunnel State Park is named after the one-million-year-old cave which runs under Purchase Ridge, allowing Stock Creek to go in one side and out the other. A railroad has taken advantage of this natural passage to follow the path of the creek, and daily coal trains can be seen roaring through the tunnel. The Wilderness Road Blockhouse erected at Natural Tunnel State Park in 2003 is typical of the blockhouses that were manned by the Holston Militia during the frontier conflict between the Indians and settlers.