Construction of the Golden Gate Bridge.

In the extreme Russian north a team of engineers are ready to dismantle a Typhoon-class submarine – the world's largest nuclear submarine. In its heyday, this monster sub was a terrifying weapon of war. It prowled the oceans of the world armed with 20 deadly nuclear missiles. Now that the Cold War is over, the Typhoon is ready for demolition. But dismantling a submarine with two nuclear reactors is a risky mission. It will take the team over a year to remove the radioactive nuclear fuel, move the submarine into the dry dock and cut its hull into pieces small enough for recycling.

Located 5 km off the coast of Osaka, Japan, is the Kansai International Airport. The airport is built entirely on a man-made island, 4 km long and 1 km wide. The only link between the island and Osaka is by the world’s longest 2-tiered bridge. Although the airport is built to withstand earthquakes and typhoons, the artificial island itself is sinking faster than anticipated. The episode looks at the various measures that are taken to keep the airport ‘afloat’, and the various facilities and services available to keep the airport running.

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Uncover how Abu Dhabi's extraordinary Aldar HQ skyscraper, in the form of a circle sitting on its edge, came to be built.