Floris van Breugel / A colorful explosion of rocks embedded in three feet of permanent cave ice deep in a lava tube cave (illuminated with a flashlight in the utter darkness.) Lava Beds National Monument, Northern Califor...
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Doug Perrine / Hot molten pillow lava erupts from an underwater lava tube at ocean entry of Kilauea Volcano on Hawaii Island, Hawaii
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Nick Upton / Rows of seating for the Concert Hall within a volcanic lava tube, Cueva de Los Verdes, Lanzarote, Canary Islands, February 2018.
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Nick Upton / Blind albino cave crabs / Squat lobsters (Munidopsis polymorpha), a species endemic to Lanzarote, grazing on submerged rocks in a lava tube flooded with seawater, Jameos del Agua, Lanzarote, Canary Is...
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Nick Upton / Blind albino cave crab / Squat lobster (Munidopsis polymorpha), a species endemic to Lanzarote, grazing on rocks at the water's edge in a lava tube flooded with seawater, Jameos del Agua, Lanzarot...
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Alex Mustard / Tourist explores a lava tube beneath Santa Cruz Island, Galapagos National Park, Galapagos Islands. Model released.
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David Fleetham / Divers with torches silhouetted at the entrance to First Cathedral cave off the Island of Lanai, Hawaii. August 2007. Model released
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Doug Perrine / RF - Hot lava from the 61G flow from Kilauea Volcano entering the ocean from the open end of a lava tube at the Kamokuna entry in Hawaii Volcanoes National Park, producing steam explosions, Kalapana,...
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Doug Perrine / RF - Hot lava from the 61G flow from Kilauea Volcano entering the ocean from the open end of a lava tube at the Kamokuna entry in Hawaii Volcanoes National Park in the pre-dawn, causing steam explosio...
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Doug Perrine / RF - Hot lava from the 61G flow from Kilauea Volcano entering the Pacific Ocean from the open end of a lava tube at the Kamokuna entry in Hawaii Volcanoes National Park, producing steam explosions, Ka...
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Doug Perrine / RF - Hot lava from the 61G flow from Kilauea Volcano entering the ocean from the open end of a lava tube at the Kamokuna entry in Hawaii Volcanoes National Park, producing steam explosions that carry...
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Doug Perrine / Hot lava from the 61G flow from Kilauea Volcano entering the ocean from the open end of a lava tube at the Kamokuna entry, producing steam explosions that carry pumice rocks high into the air and rele...