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So clear are the steaming pools that to stare down into them is like staring down into a cave that leads to the earth's core.
FORBES: Magazine Article
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In the 1980s he stumbled across an opening in the earth that was 50 meters in diameter and realized this was no ordinary cave.
FORBES: By Sonya Angraini (Forbes Indonesia)
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The caving crew descends through tight passages hundreds of feet beneath the Earth's surface, guided by the gust of air that marks the cave's primary passage.
FORBES: Magazine Article