Subways in America – Extreme Engineering

Subways in America – Extreme Engineering

How do you overhaul one of the nation’s oldest and most traveled subway systems without shutting down a city for several years? New Yorkers are finding out.

Building Hong Kong’s Airport – Extreme Engineering

Building Hong Kong’s Airport – Extreme Engineering

Great video showing how the artificial island that became the airport was built, and also how the airport was connected to the city using huge bridges and tunnels.