Climbing the Sydney Harbour Bridge is a unique experience which thrills visitors and locals alike. Climbers are carefully prepared with a briefing and safety demonstration, and take on the bridge in groups of 12 at 10-minute intervals from early morning to evening every day. Climbers can choose between two guideded experiences, the Bridge Climb or the Discovery Climb: the original Bridge Climb takes visitors along catwalks and up ladders to the summit, while the Discovery Climb allows a closer look at the workings of the bridge. Most popular climb time is at twilight, when the breathtaking view from the top of the bridge is enhanced by sunset. The entire operation from preparation to descent takes three and a half hours. Each climber receives a certificate and a group photograph as a souvenir of the experience. Booking ahead is recommended to ensure you don't miss your preferred date and time.