We went to Australia for our honeymoon last year. We visited Lizard Island, Port Douglas and finished our 2-week trip in Sydney.
Of course, one of the things we had to do there (beside see an opera at the famous Opera House), was experience the Sydney Bridge Climb. They make you wear those super snazzy jumpers and a latch that attaches to a static line on the bridge, so you won't have to worry about your safety. They don't let you take cameras or cell phones with you since there's the possibility of dropping them on to oncoming traffic below - that would be no bueno. The sunglasses we were wearing had to have those neck straps connected to them, so they don't fall off our body.
Here's an excerpt about the climb from their website:
The Bridge Climb is a 3 ½ hour guided journey to the top of the Sydney Harbour Bridge. It takes you along the outer arch of the Bridge on catwalks and ladders all the way to the summit, 134 metres above Sydney Harbour.
The steady incline to the summit leaves you free to focus your attention on your Sydney experience, with opportunities to witness 360 degree views of Sydney, including east to the Sydney Opera House, west to the Blue Mountains and the Harbour city surrounds.
When you reach the top you will have a sense of achievement that you will remember forever - you've conquered an Australian icon recognised the world over!
The Bridge Climb is the ultimate Sydney experience.
It truly was an amazing experience to be on top of that bridge! The view was breathtaking - and not just because we were at a higher elevation :) If you ever have a chance to visit Sydney, I would definitely recommend the Bridge Climb -- worth every penny!