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tunnels

Tunnel Basics
Image: iStockphoto.com/beerkoff

Tunnel Basics

Why have a page on tunnels? A tunnel is just a hole open at both ends, right?

But suppose you're digging that hole under the ocean, or through mountains or sand, or beneath tall buildings anchored into the same ground? As you'll see here, modern tunnels are marvels of engineering...and some ancient ones are, too.

WGBH/PBS
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How to Build and Use a Subsonic Wind Tunnel

How to Build and Use a Subsonic Wind Tunnel

A wind tunnel shows how a new plane, helicopter, or spaceship will fly. You can build a simple one if you’re ready for a challenge. More...

Activity
Science Buddies
The World’s 18 Strangest Tunnels: Gallery

The World’s 18 Strangest Tunnels: Gallery

Take a tunnel tour of the world. See an invasion tunnel, a smuggling tunnel, a natural tunnel, among many others. More...

Images
Popular Mechanics
Bridges and Tunnels

Bridges and Tunnels

What sort of bridge or tunnel do you build to cross a particular terrain or water body? You'll find a number to choose from here. More...

Article
ExplainThatStuff!
Building a Transcontinental Tunnel

Building a Transcontinental Tunnel

Could engineers connect Russia and America by building the longest tunnel in the world under a frigid Arctic sea? These 5 short videos show how they might do it. More...

Video
Discovery
Geotechnical Engineering

Geotechnical Engineering

Want to design and protect tunnels, pipelines, and other structures that are buried in the ground? Then you might want to become a geotechnical engineer. More...

Profile
WGBH/PBS
Inside D.C.‘s Massive Tunnel Project

Inside D.C.‘s Massive Tunnel Project

"Some people like to go to the Capitol or the White House, but this is the coolest place in the city," says an engineer about the tunnels being built in Washington, D.C. More...

Video
National Geographic
Megastructure: Boston’s Big Dig

Megastructure: Boston’s Big Dig

In Boston, the huge tunnel system called the Big Dig runs under skyscrapers and seawater, and above a subway. To really understand what went into building it, take the time to watch this show. More...

Video
National Geographic
Seikan Tunnel

Seikan Tunnel

The longest railroad tunnel ever built, the Seikan Tunnel in Japan stretches for some 33 miles (53 km). For about 14 of those miles (22 km), it runs under a seabed. More...

Video
Discovery
Swiss Create World’s Longest Tunnel

Swiss Create World’s Longest Tunnel

Watch a giant drill chew through the last remaining rock to create a tunnel that runs through some 35 miles (57 km) of mountains. More...

Video
BBC
The Channel Tunnel

The Channel Tunnel

For hundreds of years, people dreamed of a tunnel connecting Great Britain and France. Now it exists. Meet the Channel Tunnel, or Chunnel. More...

Article
BBC
The Tunnel Challenge

The Tunnel Challenge

With this activity, you can tunnel through a mountain, or under a river or a city. But your efforts will end in disaster unless you select the right tools for your task. More...

Game
WGBH/PBS
The Tunnel of Samos

The Tunnel of Samos

He had only primitive tools and no compass. But roughly 2,500 years ago, an engineer made 2 ends of a tunnel meet in the middle of a mountain. See if you can understand how he might have done it. More...

Article
Caltech
Tunneling Through the Center of the Earth

Tunneling Through the Center of the Earth

Actually, you couldn't fall through the center of the Earth in any sort of tunnel we could build today. But it's fun to imagine the experience. More...

Article
HowStuffWorks
Types of Engineering

Types of Engineering

Explore the variety of engineering careers — aerospace, agricultural, biomedical, chemical, civil, computer hardware or software, electrical, environmental, geological, nuclear, and petroleum. More...

Article
Exxon Mobile

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