Extreme Engineering

1. Tokyo's Sky City

In Japan, plans are on the table to build Sky City, the tallest structure on ...

2. Subways in America

The world's great cities have always struggled to find a balance between the ...

3. Transatlantic Tunnel

Rail travel may yet go intercontinental. In prototypes of floating tunnels, 5...

4. City in a Pyramid

Tokyo is one of the most crowded cities in the world. To relieve the stress o...

6. Tunneling Under the Alps

This Swiss monster is the longest tunnel in the world.

7. Building Hong Kong's Airport

The Hong Kong international airport is the largest civil engineering project ...

8. Holland's Barriers to the Sea

The Delta Works, a series of massive, computer-controlled sea barriers and da...

9. Boston's Big Dig

In a series of engineering firsts, two interstate highways are being rebuilt ...

10. Widening the Panama Canal

Daily, ships the size of a city block transport goods through the Panama Cana...