Discovery Channel - Strip the City (2012) Part 4 Harbour City Sidney

How does Toronto's CN Tower stay protected from frigid -32 C weather and savage snowstorms? What stops Dubai's super-tall skyscrapers - balanced on unstable sand - from toppling over? And how can San Francisco survive - sitting on the edge of a major earthquake fault? What lies beneath major metropolises is revealed when STRIP THE CITY peels back their buildings, roads, and rivers to explore the secret technology and infrastructure that keeps them running. This six-part original-Canadian series uses stunning CGI animation to go beneath Toronto, London, Rome, Dubai, Sydney, and San Francisco.

Part 4: Harbour City Sydney

Sydney is home to a fifth Australia's entire population and is trapped between the Blue Mountains and the ocean, sitting on the driest inhabited continent on Earth, and surrounding one the planet's largest natural harbours. This episode uncovers what is inside Sydney's buildings and beneath its streets that allow the city to function - from the concealed contours of the harbour that allow super-sized ships to sail into the heart of the city, to the underground caverns that store its water.

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