Haydenville Tunnel is said to be haunted by workers who died during the tunnel's construction. The tunnel served as a passage under a ridge to haul clay from where it was dug back to a brick plant which was the sole reason for Haydenville Ohio existing. The tunnel is often said to run under the Haydenville cemetery however, I don't believe the tunnel lines up properly to do so. A cave-in inside the tunnel prevents complete passage thru from one opening to the other. While a few of our pics show some odd fogs and colors we didn't experience anything unusual while we were there.