The World Widest bridge

Sydney Harbour Bridge is the world's largest (but not longest as thats the New River Gorge in the USA) steel arch bridge, and, in its beautiful harbour location, has become a renowned international symbol of Australia.

Its total length including approach spans is 1149 metres and its arch span is 503 metres. The top of the arch is 134 metres above sea level and the clearance for shipping under the deck is a spacious 49 metres. The total steelwork weighs 52,800 tonnes, including 39,000 tonnes in the arch. The 49 metre wide deck makes Sydney Harbour Bridge the widest Longspan Bridge in the world.

It now carries eight vehicle lanes, two train lines, a footway and a cycleway. After inviting worldwide tenders in 1922, the New South Wales Government received twenty proposals from six companies and on 24 March 1924; the contract (for Australian 4,217,721 pounds 11 shillings and 10 pence!) was let to the English firm Dorman Long and Co of Middlesbrough.

the small cap :)

The World Longest Suspension bridge

Imagine an iconic bridge (the Golden Gate, for example), and chances are you've thought of a suspension bridge. These elegant structures are formed by literally "suspending" the road deck from steel cables strung between towers. This style will never measure as far as other types—viaducts like the Danyang-Kunshan Grand Bridge are supported from below by pylons and can thus stretch as long as needed—but suspension bridges rank among the lightest, strongest, and most beautiful bridges in the world.

At nearly four times the length of the Brooklyn Bridge, Japan's Akashi Kaikyo Bridge (also known as the Pearl Bridge) is the clear winner in this category. With three connected spans—two at 3,150 feet and one at 6,532 feet—the Pearl stretches a total of 12,831 feet across the Akashi Strait from the cosmopolitan port city of Kobe to Awaji Island (which, not coincidentally, is the hub of Japan's pearl industry). Japan gets hit with extreme weather conditions, and this bridge, completed in 1998, was built to withstand them all, including winds up to 179 mph and earthquakes up to 8.5 on the Richter scale. But that doesn't mean this bridge isn't a beauty: In addition to its connection to the Japanese pearl industry, the bridge gets its nickname from the lights on its cables, which are said to resemble a strand of colorful pearls at night.

the documentatry :)

The World Longest Footbridge

When this 6,767-foot-long steel cantilever railroad bridge opened in 1889 over the Hudson River, it ranked as the longest bridge in the world. It carried trains across the river for 85 years until a fire damaged the tracks in 1974, forcing it to close. Thirty-five years later, after several false starts at restoration, a nonprofit group called Walkway Over the Hudson reopened the bridge, this time as a pathway for pedestrians and cyclists, in October 2009. Now a state historic park, the Walkway Over the Hudson is the longest footbridge in the world, serving as a link between trails on both sides of the river for walkers, runners, cyclists, and rollerbladers.

Best Vantage Point: In the fall, the leaves turn the banks of the Hudson into a collage of reds, oranges, and yellows. Picnic on one of the tables at either end of the bridge before strolling across, giving yourself plenty of time to snap photos along the way. walkway.org.

re-opening the walk way bridge :)

The World Most Photographed Bridge

With its trademark "international orange" paint, its picturesque surroundings, and the daily rolling in of the morning fog, it should come as no surprise that the Golden Gate Bridge is said to be the most photographed in the world. David Crandall, assistant professor of informatics and computing at Indiana University, thinks the numbers back up this claim. In a recent study, he tracked text tags for nearly 35 million images on Flickr to determine which world sights were shot the most. While other bridges — namely London's Tower Bridge, Florence's Ponte Vecchio, and New York's Brooklyn Bridge — were close runners-up, two simple facts gave the San Francisco structure a winning edge: geography and size.

The City of Hills has so many vantage points — and the bridge is such a looming presence in the skyline — that the Golden Gate manages to sneak into scores of photos, even when it's not the intended subject. Trying to take a shot of the Presidio? The harbor? The city skyline? There's a good chance the Golden Gate might make an appearance, whether as the main focal point or just a happy accident.

Best Vantage Point: At Kirby Cove, in the Marin headlands north of the city, you get the trifecta: a spectacular view, a healthy dose of nature, and no crowds. To get there from Highway 101, take the last exit for Sausalito and follow Conzelman Road until you reach the parking area on the left. From there, walk down the steep dirt path lined with eucalyptus and cypress trees until you reach the cove.

driving through the bridge :)

The World Most Bricks Used to Build a Bridge

At 1,860 feet long, or about one third of a mile, the Goltzsch Valley Bridge in the eastern German state of Saxony may seem like a minor player in the bridge world. But the length isn't what sets it apart; it's the material. At a time when most bridges were built with stone or metal, this one was built with bricks—20 million of them. It would be an odd (and costly) choice of material in most places, but in this area of Saxony, where there were several large clay deposits, it was an economical one. In fact, it's thanks to those same clay deposits that the second-largest brick bridge in the world, the Elster Valley Bridge, is also in Saxony; it's a quaint counterpart, made with only 12 million bricks.

the stone bridge :)

The World Longest Bridge

When it comes to bridges, China doesn't mess around—the country is home to 11 of the world's 15 longest. Three of the top five bridges are part of the Beijing-Shanghai High-Speed Railway, a $33 billion project that will nearly double the capacity of the route to 80 million annual passengers. Opened to the public in June 2011, the Danyang-Kunshan Grand Bridge ranks as the world's longest. It stretches an astonishing 102.4 miles—that's longer than the distance between New York City and Philadelphia!

view of the snake :)

The World Longest Covered Bridge

When the Canadian government was being wishy-washy about whether or not to build a bridge across the St. John River, a group of private citizens took matters into their own hands. They formed the Hartland Bridge Company and opened the 1,282-foot-long bridge in 1901. Five years later, in what had to be a vindicating we-told-you-so moment, they sold it to the government, who took over all maintenance. Though covered bridges are now seen as quaint and old-fashioned, the icon's construction was not without its share of controversy. Shelter made sense in terms of weather—snow and ice are a sure thing throughout the winters here—but the public worried it would encourage risqué behavior among the town's youth. In the end, it was covered, and perhaps their fears were warranted: Legend has it, men would train their horses to stop halfway across the bridge so they could sneak in a kiss before crossing over to the other side.

drive throw the bridge tunnel :)