Thrihnukagigur Volcano is the only spot on earth where it's advisable to explore a magma chamber from the inside. The volcano has not erupted for 4.000 years and shows no signs of coming to life anytime soon, so it is safe to enter.
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But how many people can say they've been inside a volcano? Inside the magma chamber of a dormant, lava spewing beast? Turns out, only people that have been to Thríhnukagigur Volcano in Iceland.
Don't step on lavaNew lava, and that means even lava from an eruption from a few years ago, is not safe to walk on because there might be huge wholes that you could fall into. When lava flows, the layer which is closer to the air solidifies faster and that turns into tunnels through which the hot lava flows.