The city's leading surveyors reveal the secrets that keep LA's skyscrapers standing, protect its roads and aqueducts and prepare its residents for 'the Big One'. S2/Ep8
Stunning CGI animation peels back Machu Picchu's terraces and reveals the stonework that made Inca roads one of the most advanced highway systems in the ancient world. S2/Ep7
Paris was built on top of ancient limestone quarries. Using CGI to strip it, layer by layer, explore the infrastructure that keeps it from crumbling under its own weight. S2/Ep6
Using CGI to strip it of its steel and concrete, explore the infrastructure that keeps New Orleans safe from potential 30ft waves and tropical cyclones. S2/Ep5
Using CGI to strip it of its layers, explore the infrastructure that keeps Tokyo prepared for the plethora of potential natural disasters that plague the city. S2/Ep4
Using CGI animation to strip it of its steel and concrete, layer by layer, explore the infrastructure that keeps Venice afloat through frequent floods and erosive salt water. S2/Ep3
Using CGI animation to strip it of its steel and concrete, layer by layer, explore the infrastructure that keeps Chicago standing amidst extreme winters and heat waves. S2/Ep2
Using CGI animation to strip it of its steel and concrete, layer by layer, explore the infrastructure that keeps the city standing through massive storms. S2/Ep1
London has more infrastructure built underground than any other city in the world. How do engineers maintain and develop this vast network of tunnels? S1/Ep5
Each winter, the temperature in Toronto plummets to -40 and the city is hit by savage snowstorms. How does this vast metropolis thrive in such extreme conditions? S1/Ep4
The city of Sydney is thriving; how have engineers capitalised on the concealed contours of the city's harbour, and why do deep gorges threaten its future? S1/Ep3
With the help of stunning CGI animation, explore the geological, architectural and technological foundations of some of the world's largest cities. S1/Ep1