Challenging puzzle for experienced crossword solvers
Easy Underground Tunnel Systems Puzzle is a easy crossword puzzle with 18 clues covering . Play it online for free below, or create your own crossword with our free crossword maker.
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Easy Underground Tunnel Systems Puzzle
Perfect for beginners with simple, common vocabulary
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Across
- 1. Places where minerals or coal are dug underground
- 2. Covered underground
- 4. Underground train system in a city
- 6. A nearly horizontal passage underground
- 9. Needed to see in tunnels
- 10. An arched underground chamber
- 14. Below the surface of the ground
- 15. A natural underground hollow
Down
- 3. Material used to build tunnel walls
- 5. A passage dug through or under the ground
- 7. A pipe or channel for air or cables
- 8. An excavation or passage in a mine
- 11. Rails where trains run underground
- 12. A vertical tunnel for access or ventilation
- 13. To climb or go up, often inside tunnel walls
- 16. A type of rock often found around tunnels
- 17. A cylindrical underground passage
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