Surtshellir, Borgarbyggð, Islande
Hellar

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Stefánshellir Cave

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TypeLava tube
Length1520 m
DifficultyChallenging

Stefánshellir Cave

Stefánshellir is a large lava tube in the Hallmundarhraun lava field and forms part of the extensive Surtshellir–Stefánshellir cave system.

Together, Surtshellir and Stefánshellir extend for roughly 3.5 kilometres beneath Hallmundarhraun, a lava field formed shortly after Iceland was settled.

The cave is natural and unlit, and conditions can be demanding. Visitors should use a helmet, reliable lighting and suitable footwear.

Lava tube
Helmet required
Headlamp required
Open to public

Geology

Part of the extensive Surtshellir–Stefánshellir lava-tube system in Hallmundarhraun.

Last verified 16 September 2026 Source

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