Great mood you have capture here.
A human figure ( at the end of the tunnel ) would make this even better but it doesn't mean it's bad the way it is now.

I totally agree about the human figure. I actually waited for quite a while but it was a rarely used tunnel as there is an enclosed spiral staircase at the other end which is inconvenient for some people and I ran out of patience. I could have ran the tunnel in 10 seconds to capture myself with the camera self-timer, but I didn't have a tripod....sigh. Thanks anyway.

Isn't there supposed to be a huge, glowing eye at the top?

Oppsss....sorry for the oversight