Moderate difficulty suitable for most players
Arcane Structures Beneath the Surface
Challenging puzzle for experienced crossword solvers
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Across
- 1. Engineering term for intentional subterranean emptiness to reduce load
- 2. Glass-like volcanic rock sometimes used in underground fortifications (plural)
- 4. Ventilation apertures piercing roofs in pit dwellings and underground homes
- 6. Sacred underground chambers, often beneath churches and mausoleums
Down
- 3. Discipline analyzing sediment layers, key to subterranean temporal mapping
- 5. Labyrinthine burial vaults, echoing whispers of the ancient dead
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