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Nāhuku Lava Tube in Hawaiʻi Volcanoes National Park

A natural conduit formed by flowing lava from a volcanic vent.

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Nāhuku (Thurston Lava Tube), located within Hawaiʻi Volcanoes National Park, is one of several lava tubes on the island. Here are some fascinating details about

  1. Formation - Nāhuku was created by a river of molten lava. When a lava tube is active, the lava flows along its floor at temperatures exceeding 2,000°F (1,090°C).  As the lava supply stops at the end of an eruption or diverts elsewhere, it leaves behind an empty cave—a lava tube.

  2. Discovery and History - Discovered in 1913, the roof of Nāhuku was originally covered with lava drippings. Unfortunately, souvenir collectors caused those formations to disappear.

  3. To preserve this incredible resource, visitors are urged not to touch the walls or delicate tree root systems hanging down. Experience the lava tube with your eyes only.

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