Is there a light at the end of the tunnel?

 Good morning,

Here we are in a tunnel in the Smoky Mountains.

 I remember going through tunnels in this area with my parents (more years than I want to say ago) when the tunnels were still somewhat primitive.  There were no lights except headlights on cars and the tunnel sides were rock, not concrete.

 Ah, yes...

 ...there is a light at the end of the tunnel. 

:),

Lois