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

Off the coast of Holland, amidst turbulent winds and stormy seas, workers construct huge wind turbines. However, the high winds and an unstable ship put the workers in danger.

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.

In a rugged canyon, down river from the Hoover Dam, a team of construction veterans is building the biggest concrete-arch bridge on the continent.

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

In South Korea, shipbuilders have just ten weeks to assemble the hull of the first oil tanker-icebreaker, with its two innovative $10 million propeller units.

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

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.

A $600 million hydroelectric project in remote British Columbia in Canada presents a host of unique problems. Follow its difficult construction.

Six years after piles were pounded into the muddy bottom of San Francisco Bay the new Bay Bridge is about to be topped off.

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.

Following the construction of the longest, fastest and tallest roller coaster, the Tatsu, located at the Six Flags Magic Mountain in Valencia, California.

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.