It has been centuries since lava flowed through this particular cave. Caver Chris Heinlein stands in Kazumura on the remnants of a lava pond. It was created when gas-filled lava pooled in one spot ...
The Kazumura lava tube system, within the 500 year-old 'Ailā'au lava flow of Kīlauea in Hawaii, is more than 40 miles long and is thought to be the longest lava tube cave in the world.
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