Editing Sydney Harbour Bridge (section)

===BridgeClimb===
[[File:BridgeClimb participants on Sydney Harbour Bridge.jpg|thumb|BridgeClimb participants, wearing the mandatory special jumpsuits]]
In the 1950s and 1960s, there were occasional newspaper reports of climbers who had made illegal arch traversals of the bridge by night. In 1973 [[Philippe Petit]] walked across a wire between the two pylons at the southern end of the Sydney Harbour Bridge. Since 1998, [[BridgeClimb Sydney|BridgeClimb]]<ref name="autogenerated1">{{cite web|url=http://www.bridgeclimb.com/|title=BridgeClimb|publisher=BridgeClimb|access-date=23 December 2010|archive-url=https://web.archive.org/web/20101227085143/http://www.bridgeclimb.com/|archive-date=27 December 2010|url-status=live}}</ref> has made it possible for tourists to legally climb the southern half of the bridge. Tours run throughout the day, from dawn to night, and are only cancelled for electrical storms or high wind.<ref name=checklist>{{cite web|title=BridgeClimb - Pre-Climb Checklist|url=http://www.bridgeclimb.com/things-you-need-to-know-to-climb/|website=[[BridgeClimb Sydney]]|access-date=20 January 2017|archive-url=https://web.archive.org/web/20170119193627/http://www.bridgeclimb.com/things-you-need-to-know-to-climb/|archive-date=19 January 2017|url-status=live}}</ref>

Groups of climbers are provided with protective clothing appropriate to the prevailing weather conditions, and are given an orientation briefing before climbing. During the climb, attendees are secured to the bridge by a wire lifeline. Each climb begins on the eastern side of the bridge and ascends to the top. At the summit, the group crosses to the western side of the arch for the descent. Each climb takes three-and-a-half-hours, including the preparations.<ref name=checklist/>

In December 2006, BridgeClimb<ref name="autogenerated1" /> launched an alternative to climbing the upper arches of the bridge. The Discovery Climb allows climbers to ascend the lower chord of the bridge and view its internal structure. From the apex of the lower chord, climbers ascend a staircase to a platform at the summit.<ref name="autogenerated1" />