Volcanic Eruption Hike lava flow. Photo by Simon Svensson Photography Geldingadalsgos Volcano. Posted on May 14, 2021May 14, 2021 REYKJANES, VOLCANO & LAVA TUNNEL 1440 × 960 Volcanic Eruption Hike lava flow. Photo by Simon Svensson Photography Geldingadalsgos Volcano. Volcanic Eruption Hike lava flow. Photo by Simon Svensson Photography Geldingadalsgos Volcano.