I have always been fascinated by Port Adelaide's Birkenhead Bridge.
The idea that a bridge can decide to not be a bridge anymore, open up to let tall ships through and then transform back into a bridge again seemed to me to be a marvel of engineering.
To be fair I was only a child at the time and up until that realisation a bridge was a bridge, was a bridge, was a bridge!
My experience of a transforming bridge must seem so naive in this day of mechanical transformers such as Optimus Prime, Megatron and Bumblebee.
To me however, Port Adelaide's Birkenhead Bridge will always be the original transformer!
Photo: Robert Rath, 'Day 835, Birkenhead Bridge', 1/8000s f16 ISO100 130mm