On one evening I was lucky enough to visit Vivid Sydney 2009. That was an amazing festival of music and light happening all around Sydney. This picture shows one of the installations called Rocklights, the light projection in Argyle Cut by German artist and stage designer Ingo Bracke. Argyle Cut itself is a tunnel that was cut through the sandstone by convicts with basic digging tools at first and then by explosives. That was a huge job for year 1868 and it is no wonder it took 25 years to complete.
The picture is tonemapped HDR from a single RAW file. The shot was taken from a tripod with 8sec exposure.