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Volcanoes National Park, the N?huku Thurston Lava Tube, a long tubular cave formed…

Volcanoes National Park, the N?huku Thurston Lava Tube, a long tubular cave formed when lava cooled. the entrance into the open air.
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Volcanoes National Park, the N?huku Thurston Lava Tube, a long tubular cave formed when lava cooled. the entrance into the open air.