I’m standing on a steel walkway 440 feet above Sydney Harbor when a voice crackles over my headset. My guide tells me to look right and take in one of the world’s most stunning skylines.
The view: the familiar clamshell roof of the Sydney Opera House, ferries crisscrossing the sparkling water. Below me, cars and trains rumble across the Sydney Harbour Bridge, the world’s tallest steel-arch span. But up here, as twilight descends, with my head nearly in the clouds, it feels like I’m floating over a toy city.
I now see why scaling the Sydney Harbour Bridge ranks as one of Australia’s most popular experiences, attracting more than four million climbers (including, recently, Michelle and Barack Obama) since the first customer stepped onto its steel beams 25 years ago this week on October 1, 1998. The climb has helped make the bridge an instantly recognizable landmark, and the experience a lure for anyone visiting the continent. It also helped change tourism around the world.
Climbers pay more than $200 (U.S.) for the privilege of standing above a commuter roadway in nearly any weather and absorbing the incredible view from the Coat Hanger, the nickname locals gave the bridge even before it opened in 1932.
But few climbers stop to think about the novelty of it all: how Australia turned a piece of infrastructure—a commuter bridge—into an unlikely global tourist attraction that has inspired similar bridge experiences around the world, from New Zealand and Japan to Portugal and West Virginia.
Taking a chance on bridge climbing
As thrilling as it is, the Sydney bridge climb is surprisingly easy, attracting customers ages eight to 100. The summit has been the site of countless marriage proposals and more than 30 weddings. Every five minutes during peak periods, a guide leads small groups onto the bridge superstructure. Climbers ascend ladders and followcatwalks built for maintenance workers. They must wear harnesses and remain clipped to safety cables during the entire journey.
Perhaps even more daring than the climb was the journey to create it. In 1989 Paul Cave, the president of a tile manufacturing company, had a rare chance to climb the bridge during an international business conference hosted in Sydney. He saw the excitement in his colleagues’ eyes and instantly realized the tourism potential.
“Their reaction … was just quite amazing,” he told the University of New South Wales in a 2012 video on business leadership. “I thought I‘ve just got to share this with the world.”
(See some of the world’s most architecturally impressive bridges.)
Until that point climbing the bridge had been largely a renegade middle-of-the-night activity, says Barry Newling, an official with the state government agency that owns and operates the span. He admits to hopping a gate and sneaking out over the harbor himself when he was a university student in the 1970s. “The bridge had no security on it,” he says.
But it would take nearly a decade to turn the climb into a business. When Cave requested government permission, he received a disappointing response: a letter with 64 reasons why he couldn’t safely do it.
Undeterred, he methodically began to address every objection. For example, the government was concerned that climbers would distract drivers. Cave’s answer: Outfit each visitor in a blue-grey jumpsuit that blends into the bridge.
Another worry was that customers could drop something on the roadway. “We don’t want things falling,” says Newling, who negotiated the latest bridge climb contract. “You can’t have any loose clothing, cameras, sunglasses. Imagine a camera falling from high and smashing a windscreen. You’d have a catastrophe.”
Cave’s response was to require all customers to pass through metal detectors.
Then there was the fear of drunk climbers. The answer: mandatory Breathalyzer tests.Other accommodations include outfitting climbers with helmets, headlamps, gloves, rain gear, and even handkerchiefs that clip to their suit, reducing the chance they’d drop onto the roadway.
Finally, after more than nine years of planning, Cave and his investors won permission to turn the Harbour bridge into a travel adventure, and it welcomed its first guest in October 1998.
The thrill of urban adventures
The experience appealed to a new generation of thrill-seeking tourists. “People wanted more than just the usual, than just seeing the sites. They wanted to do things which at least on the surface look a little scary,” says David Beirman, an adjunct fellow at the University of Technology Sydney, where he teaches tourism and destination marketing. “The bridge climb ticked a lot of boxes.”
The climb also helped pave the way for a surge of new urban adventures, such as traversing glass-floored observation decks and scaling skyscrapers. “In a way the climb was really extreme tourism. It was a little bit ahead of its time,” Newling says.
When the bridge climb contract came up for renewal in 2018, officials ultimately awarded the concession to a company other than Cave’s. New offerings now include an Aboriginal-themed climb with an Indigenous storyteller who points out ancient landmarks and shares Sydney’s precolonial history.
In the decades since the first climb, the commuter crossing had been transformed “from a postcard to a global bucket list experience,” Cave said in a statement after his company lost the contract. “It has been a privilege for us to make a hero of the bridge.”
WHERE TO BRIDGE CLIMB
Since the Sydney Harbour Bridge Climb debuted in 1998, many other places have launched similar urban adventures. Here are a few:
Story Bridge Adventure Climb, Brisbane, Australia
Visitors reach a 262-foot deck over the Brisbane River, offering views of the city, mountains, and islands.
Matagarup Bridge Climb, Perth, Australia
Not only can customers ascend the suspension pedestrian bridge over the Swan River, but they can zipline down.
Akashi Kaikyo Bridge Tour, Kobe, Japan
Visitors follow a catwalk underone of the world’s longest suspension spans, and then take an elevator to the top of 948-foot-high bridge tower.
Auckland Bridge Climb, New Zealand
Along with climbing the bridge, thrill-seekers can bungee jump over Auckland Harbor.
Porto Bridge Climb, Portugal
The tour scales a concrete arch of the Arrábida Bridge, reaching more than 200 feet over the Porto River.
Bridge Walk, New River Gorge National Park, West Virginia
The walkway under the New River Gorge Bridge crosses a dizzying 876 feet above the water.
Larry Bleiberg is a Charlottesville, Virginia-based travel writer. Follow him onInstagram andFacebook.
A version of this story appears in the February 2024 issue ofNational Geographic Magazine.