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The construction of Johannesburg's new rail system presents a difficult set of problems, most particularly dangerous sinkholes across its route.

The London 2012 Aquatic Centre is an engineering marvel shaped like a giant metallic wave, designed by world famous architect Zaha Hadid

A rescue tunnel is needed to free one of the world's largest machines stuck in the world's longest tunnel in the Swiss Alps.

As the awesome mega-project goes under the hammer, a look at how the Burj Dubai in the United Arab Emirates is set to become the tallest building on Earth.

For 15 years, Canadian diving enthusiasts have been trying to turn the coastal waters off southern British Columbia into the wreck-diving capital.

Under a sweltering sun in the heart of Madrid, Spanish construction workers are working non-stop on the largest highway project in the world.

A look at the complex construction of the new 13km double span bridge in Bangkok, Thailand.

Inside a famous Swedish hotel which is constructed from 10,000 tonnes of ice and 30,000 tonnes of snow, and boasts a frozen bar and cinema screen.

Mega Builders return to Istanbul to update the Marmaray rapid-transit project, which continues to have delays.

Crews race against the clock to finish an important venue and signature landmark for the 2012 London Olympics.

The Hard Rock Café is financing a $400m rock and roll theme park in South Carolina, the first in the world. What began as a whim soon turns into a very expensive reality.

A plan to install 78 massive gates across the three inlets into Venice's lagoon may be the city's only saviour. See the mammoth project take shape.

Can engineers make 6,000-ton concrete pontoons float? That's the only way to construct this astonishing bridge in Canada, but can they pull it off?

MGM builds a 31-hectare mini city in Las Vegas, the largest privately-finances project in North America.

Seoul needs a direct link to its island airport. This involves building one of the most ambitious bridges in the world, spanning almost 13km of water.

In Norway, engineers aren't satisfied with building the world's largest oil rig; so they're constructing two. Watch this incredible engineering feat unfold.

Discover the amazing story behind the construction of Hong Kong's Stonecutters Bridge, one of the world's largest cable-stayed bridge.

With the spectator capacity of 60,000, the new Rio stadium is smaller than some of Brazil's mega stadiums, but its design is unique, clever and state of the art.

Focusing on the world's largest water park, built in Tenerife, with the tallest artificial wave and biggest artificial beach.

The world's biggest cargo ship, being built in Denmark, has only 45 days to be completed. Will the crew make it in time?