This tunnel was dug to allow the timber getters to transport their logs to the yards.  It was dug by hand, for 250 metres through a hillside.  That was a pretty remarkable feat – I stood at the entrance and imagined a pick in my hand.  Didn’t look enticing.

The second photo is interesting.  It was so dark in the tunnel, I couldn’t see the floor.  In order to show up the walls the photo was taken using HDR photography with 12 different pictures and one flash merged together.

The details are made visible by using differing exposures and ISO numbers, and post-processing to balance the images.  Took ages, as you might expect, but a nice result.