CrosswordMint
Underground Passageways and Tunnel Networks
Moderate difficulty suitable for most players
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Across
  • 1. Vertical tunnel used to access mineral deposits
  • 4. Man-made passageway beneath obstacles or terrain
  • 5. Road or walkway crossing under another path
  • 7. Urban underground railway system for commuters
  • 8. Steep slope sometimes featuring subterranean paths
Down
  • 2. Process of drilling tunnels through rock
  • 3. Common European term for city train systems
  • 6. Horizontal underground passageways in mines
  • 9. Ancient underground burial chamber
  • 10. Large natural underground chambers

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