The northern portal of the Kennerdell Tunnel along the Allegheny River Trail near Emlenton, Pennsylvania. Between the shadows, the overgrowth, the bright sunlight, and my sunglasses, I almost missed it! I thought it was just a shady part of the trial. I didn't realize I was about to ride into a tunnel until the cold air hit me.
Looking at the northern portal of the Kennerdell tunnel along the Allegheny River Trail near Emlenton, Pennsylvania. This highlights the brick and stone work. The tunnel was dug by hand and opened in 1866. It's over 3300 feet long.
The 3300-foot-long Kennerdell tunnel without any artificial light. It's pitch black inside. The only light is coming from the portals on either end, nearly .6 mile apart. This is a 3-second exposure.