Walt Disney Concert Hall, Los Angeles, US

The Walt Disney Concert Hall is the fourth hall of the Los Angeles Music Centre. The project was launched in 1992, when Lillian Disney, widow of Walt Disney, donated $50 million.

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This amazing steel structure was designed by Frank Gehry. The Walt Disney Concert Hall is hailed for its acoustics, considered to be one of the best in world.

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Gateway Arch, St. Louis, United States

Designed by Finnish-American architect Eero Saarinen and German-American structural engineer Hannskarl Bandel in 1947, the Gateway Arch, or Gateway to the West is the centerpiece of the Jefferson National Expansion Memorial in St. Louis, Missouri.

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At 630 feet, it is the tallest man-made monument in the United States.

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The Brooklyn Bridge in New York City is one of the oldest suspension bridges in the United States.

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Completed in 1883, it connects the boroughs of Manhattan and Brooklyn.

With a main span of 1,595.5 feet (486.3 m), it is the world's first steel-wire suspension bridge.

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Tyne Bridge, Newcastle, UK

The Tyne Bridge is a through arch bridge over the River Tyne in North East England, linking Newcastle to Tyne and Gateshead.

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It was designed by the engineering firm Mott, Hay and Anderson, who later designed the Forth Road Bridge, and was built by Dorman Long and Co. of Middlesbrough.

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Willis Tower, Chicago, US

Willis Tower is a 108-storey, 1,451-foot skyscraper in Chicago, Illinois. At the time of its completion in 1973, it was the tallest building in the world, surpassing the World Trade Center towers in New York.

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The chief structural engineer was Fazlur Khan from Bangaldesh and chief architect was Bruce Graham.

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Sydney Harbour Bridge

The Sydney Harbour Bridge is a steel arch bridge across Sydney Harbour that carries rail, vehicular, bicycle and pedestrian traffic between the Sydney central business district (CBD) and the North Shore.

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Opened in 1932, the bridge's design was influenced by the Hell Gate Bridge in New York. According to the Guinness World Records, it is the world's widest long-span bridge.

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US Steel Tower, Pittsburg, US

The US Steel Tower, also known as the Steel Building is the tallest skyscraper in Pittsburgh, the fourth tallest building in Pennsylvania.

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Completed in 1970, the tower has 64 floors and has 2,300,000 sq ft of leasable space.

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New York Times Building, New York

The New York Times Building is a skyscraper on the west side of Midtown Manhattan that was completed in 2007.

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The tower was designed by Renzo Piano Building Workshop and FXFOWLE Architects, with Gensler providing interior design.

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Tatara Bridge

The Tatara Bridge is a cable-stayed bridge, with a center span of 890 metres (2,920 ft). As of 2010 it has the fourth longest main span of any cable-stayed bridge after the Sutong Bridge.

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The expressway is a series of roads and bridges that is one of the three routes of the Honshu-Shikoku Bridge Project connecting the islands of Honshu and Shikoku across the Seto Inland Sea in Japan.

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Inland Steel Building

Inland Steel Building is one of the Chicago's defining commercial high-rises of the post-World War II era.

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Its principal designers were Bruce Graham and Walter Netsch of the Skidmore, Owings & Merrill architecture firm.