Big digs and big danger–take a tour of the world’s greatest tunnels.

How do tunnels stay dry under water? Who dug the first tunnels? Go underground with award-winning author-illustrator- and captivating storyteller- David Macaulay (The Way Things Work) and get an amazing look at tunnels through spectacular film footage, little-known facts and dramatic recreations. From ancient Rome to the remarkable Channel Tunnel that connects France and England, Tunnels introduces courageous engineers, relives deadly disasters, and reveals little-known personal triumphs and tragedies.

– Be a mole in Boston’s "Big Dig" and see how the biggest tunneling project in history is reshaping one of America’s oldest cities – Travel back to 1920 and discover how Clifford Holland constructed- and ventilated- the first underwater automobile tunnel – Meet the engineer whose revolutionary design for London’s famous subway system greatly altered British lifestyles – See how massive boring machines joined England and France beneath the English Channel – Tour the tunnels that helped make ancient Rome livable – Bonus activity! Build your own mini-tunnel using only sand, masking tape, a spoon and other common household items

David Macaulay hosts Building Big, the five-part series that brings you the amazing truth behind the greatest manmade wonders of the world. From the top of the Golden Gate Bridge to inside the Hoover Dam, Building Big travels the world exploring Bridges, Tunnels, Dams, Skyscrapers and Domes in unforgettable, really big adventures.

Includes bonus hands-on building activity designed for kids.

Special DVD features include: materials and activities for educators, scene selections and closed captions.

On one DVD5 disc. Region coding: All regions. Audio: Dolby stereo. Screen format: Letterboxed.