Amazing Structures: Tunnels

Amazing Structures: Tunnels book cover — CHAPTER 1 What Is a Tunnel 4 CHAPTER 2 Building Tunnels 8 CHAPTER 3 Types of Tunnels 14 ACTIVITIES TOOLS Try This 22 Glossary 23 Index 24 To Learn More 24

Amazing Structures: Tunnels — page 1 — What Is a tUNNEL What’s that up ahead A tunnel A tunnel is a passage that goes through or under roads mountains rivers and oceans

Amazing Structures: Tunnels — page 2 — Early Greeks and Romans built mines to dig up gold They also built tunnels called aqueducts These tunnels carried fresh water to cities

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