Saudi Arabia: Expedition Volcanic Underworld
Follow Steve on a mission to explore an unmapped volcanic underworld in search of the longest lava tube in Arabia. On this expedition, Steve and his team start their journey at the ancient city of Hegra, where secrets lie waiting to be uncovered.
Previews + Extras
How a Lava Tube Forms
S2 E2 - 2m 15s
Steve explains how a lava tube forms as he and his team search by helicopter and car for an opening that will gain them access to explore the inside of one of these unique underground tunnels.
Entering a Lava Tube
S2 E2 - 3m 44s
Steve and team scope out the edges of a fragile lava tube opening. They look for a section of rock that is stable enough for them to safely repel down into the lava tube.
Lava Tube Artifacts
S2 E2 - 4m 55s
As Steve and his team of experts explore the lava tube, they stumble upon some ancient artifacts that suggest that both humans and animals once lived inside this underground tunnel. The unique conditions of the lava tube have naturally preserved these pieces of history, giving us a glimpse into ancient life.
Lava Stalactites
S2 E2 - 2m 13s
As Steve and team explore the inside of a lava tube, they marvel over some rare lava stalactites and discuss how they formed.
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