Ellen and I have two different perspectives of this (click to view PassingByPhoto). I have taken most of my images from inside the tunnel.
There is plenty of information about the tunnel (click here) so I will concentrate on the photographs and experience.

Inside… it was cold! heck, outside it was cold. The steady breeze from inside was close to half the true temperature.
This is a long, deep, tunnel. Unfinished for a railroad. Now it is home to bats and crazy people who like to walk in the dark.

The carved walls change as you go deeper. I never went where light didn’t shine enough for me to see some things.
These images were taken after I realized the camera with me had a ‘pop up’ flash, many don’t. When I shot these I had no idea what the result would be. I made my settings in the dark, kind of focused, and fired.


I’m not sure if the entrance (above) had a low cold level shown above, or I caught glare. I usually don’t catch a glare this like.

As I went in Ellen was taking shots from the entrance, I returned the favor.
I had an interesting thought as I started in. In the northern US fences, guards, and at least a big legal disclaimer to be signed would be at the entrance. South Carolina had a sign telling people to call the police for help. Really… in the woods, up a mountain, in a dark tunnel, and I should try my cell phone.

This looks like adventures! My kids would love it. Cool! would be their first word about the tunnel. That was also the first thing I could think of.
Me too πππ
I just read about this place. Very cool shots, Ted!
Thanks. Just sorry I did not have my head lamp in the pack.