Extreme Engineering

Singapore's Skypark will hang 650 feet in the air on top of 3 skyscrapers.

Rio de Janeiro has frequent widespread blackouts. So Brazil is building one of the largest hydroelectric projects in the world, consisting of two hydroelectric dam's (Anta and Simplício).

The world's tallest twisting structure, Kuwait's Al Hamra Tower, is looked at.

In an attempt to save the city from another disaster, New Orleans is building the world's strongest hurricane protection system, including the largest storm surge barrier ever built and radical hurricane resistant homes.

Travel to the deepest place on Earth, Johannesburg, South Africa's Mponeng Gold Mine.

Overhauling the San Francisco Bay Bridge is the biggest construction projects in the US.

Melbourne, Australia is building one of the most innovative stadiums ever built. With its unprecedented geodesic roof and advanced cladding, it will be the ultimate fan experience, and an icon for a city known as the sporting capital of the world.

The Swiss government is spending 18 billion dollars to create the Gotthard Base Tunnel - the longest tunnel in the world, getting people and goods through the Alps up to 3 times faster and ultimately changing European transit forever.

Abu Dhabi's $15 billion Central Market will be a new cultural hub for an emerging world destination, complete with offices, parks, luxurious shops, and hotels - and all centered around the world's tallest residential tower, over 1250 feet high.

Danny Forster goes behind the scenes at the Port of Rotterdam, where crews are in the middle of the largest Earth-moving project in history - all to triple the port's capacity, and help it serve the biggest ships on the planet.