Extreme Engineering unveils some of the most ambitious architectural plans of our times. Some are theoretical ; others are in the works. But all of these modern marvels pose challenges that stretch the definition of what's possible. Watch as jaw-dropping computer animation and first-hand accounts from builders, designers and engineers breathe life into the most extreme construction projects ever conceived. At the world's largest open pit iron mine...

Follow a group of visionary designers and engineers who are committed to relieving the Tarn bottleneck and opening up the region to the rest of Europe by building a massive bridge to leap across the 1.3-mile wide chasm. When it's completed, the Millau Viaduct will stand as the world's highest bridge and will form the last connection in a major highway linking Spain and Italy with Paris.

Chronicles one of the largest civil engineering projects in modern history, the re-routing of I-93 and I-90 underground.

In the 1990s, Hong Kong undertook one of the largest civil engineering projects in history when it decided to build a new international airport 16 miles out to the sea. See how it was done.

Every day, somewhere in the world, 40 million people ride the subway. New York City has 842 miles of underground subway, transporting 4.5 million passangers daily. After years of neglect, the subway is falling apart. Plans are underway for a new super system that will take the subway deeper, further and faster than ever before.

In Switzerland, engineers have embarked on one of the boldest projects in history--a 35 mile-long tunnel cutting through the heart of the Swiss Alps--to redirect the crush of Europe's traffic and cargo.

Follows one of Turning Torso's construction teams as they complete an entire 400-square-meter floor in one seven-day shift.

Construction of one of the largest indoor ski resorts in the world. It is part of the Mall of the Emirates, the largest shopping mall outside of North America.

"Arizona Cardinals fans haven't had much reason to cheer in recent years, but that's set to change with the introduction of a state-of-the-art stadium. Due for completion in August, 2006, the Cards' new nest will sport a number of one-of-a-kind features from the "star-chitect" design by Peter Eisenman to North America's first slide-out tray field to the clever "pie-slice" construction method."--Discovery web site.