Potential answers for "Underground areas explored by spelunkers"

⭐⭐⭐⭐ CAVES
⭐⭐⭐ DEEPS
⭐⭐ CAVERS
⭐⭐ PIONEER
⭐⭐ RAPROCK
⭐⭐ ASIA
⭐⭐ MARS
⭐⭐ CAVEINS
⭐⭐ GEOL

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