How do tunnels stay dry under water? Who dug the first tunnels? Go underground with award-winning author-illustrator and storyteller, David Macaulay, and get a look at tunnels through film footage, little-known facts and recreations. From ancient Rome to the Channel Tunnel that connects France and England, Tunnels introduces engineers, relives disasters, and reveals little-known triumphs and tragedies.

Originally aired on Public Television. Special features: printable materials for educators and parents ; access to the Building big Web site ; scene selection.