Challenging puzzle for experienced crossword solvers
Underground Passages and Tunnel Routes
Moderate difficulty suitable for most players
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Across
- 1. A passage for air, cables, or utilities beneath a building
- 2. A road or pedestrian route that passes beneath another
- 4. Defensive military shelter often built underground
- 6. Urban underground railway system
- 7. A horizontal underground passage, often in mines
Down
- 3. Vertical or inclined passage to access underground minerals
- 5. Man-made underground passage often used for transit
- 8. Underground cemetery with narrow passageways
- 9. Underground conduit for waste water
- 10. Steep slope concealing a secret underground path
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