The old rail tunnel at Karangahake Gorge, it travels in a straight line under the hill for 1km

Light at the end of the tunnel, Karangahake Gorge

Taken on a Canon EOS 6D using a EF24-70mm f/2.8L II USM lens with a focal length of 70mm a shutter speed of 1/60s an aperture of f/2.8 at ISO 6400