Notes

31 pages : chiefly colour illustrations
Summary: Tunnels link people and places through the trickiest terrains all over the world. But how are they built and prevented from collapsing? This book presents landmark underground and undersea structures from all around the world, with plenty of artwork, diagrams, explanations and photos that make the awesome feats of engineering easy to understand. (Back cover)
For ages 8-10 years.
Awesome engineering.