On the train between Hamburg and Prague.
It took several tunnels before I was happy with the way this shot was turning out, just glad I didn't run out of tunnels!
I especially like the way the shapes and colors at the rails blended so well to form what appears to be a solid surface.

It's always fun hanging $2500 worth of gear out a speeding train in a different country;
especially at high speeds. It did take two hands just to hold on to the camera, let alone keep it steady.

This was not the First, or Only shot. I think I took 8-12 shots between 3 different tunnels. This was my favorite from those.