One of the most expensive things to do in Sydney is the Sydney Harbour Bridge Climb. Rates start at $198 for adults and $148 for kids, but vary according to the time of day when the climb is made. If you do not want to shell out that much, a cheaper alternative is $13 for adults and $6.50 for kids, pretty much with the same great panoramic views that the commercial bridge climb is supposed to offer.
Don't forget to bring your camera if you're climbing the bridge.
This alternative is a visit to the Sydney Harbour Bridge pylon lookout. The entry level of the pylon lookout is the pedestrian walkway level of the bridge. A climb up the stairs inside the pylon brings you to the first level where the admission counter is, plus exhibits. The second level features the challenges of building the steel bridge and a souvenir shop. This is followed by a mezzanine level where the rich history of the bridge is on exhibit. Finally, after 200 steps, you get to the pylon lookout, which is almost at the same level as the peak of the arch of the bridge.
The Pylon Lookout is open to the public 7 days, from 10.00am to 5.00pm, but is closed on Christmas Day. Access to the lookout is through the pedestrian walkway on the eastern side of the bridge from the city side. From Cumberland Street, The Rocks, use the Bridge Stairs. If coming from the North side, use the steps near Milsons Point Railway Station and cross towards the Opera House side of the bridge.
To get to the cheaper alternative the easiest way is go to the ferries, look for #1 wharf, stand by the terminal and look back toward the building, you will see a lift on the left hand side, go up in the lift, when you get out turn right and walk, when you get to the first bridge tower you have found it.
It is not Bridge Climb™ but it is a Sydney Harbour Bridge climb. Not all climbs of the Harbour Bridge are the same. This one is a cheaper alternative, and it includes a journey of discovery through the exhibits at the two floors before reaching the lookout. I have not claimed that it is THE Bridge Climb™. Cheers. :-)